Release 4.14 drivers/memory/omap-gpmc.c

/*
 * GPMC support functions
 *
 * Copyright (C) 2005-2006 Nokia Corporation
 *
 * Author: Juha Yrjola
 *
 * Copyright (C) 2009 Texas Instruments
 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/ioport.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/omap-gpmc.h>
#include <linux/pm_runtime.h>

#include <linux/platform_data/mtd-nand-omap2.h>
#include <linux/platform_data/mtd-onenand-omap2.h>

#include <asm/mach-types.h>


#define	DEVICE_NAME		"omap-gpmc"

/* GPMC register offsets */

#define GPMC_REVISION		0x00

#define GPMC_SYSCONFIG		0x10

#define GPMC_SYSSTATUS		0x14

#define GPMC_IRQSTATUS		0x18

#define GPMC_IRQENABLE		0x1c

#define GPMC_TIMEOUT_CONTROL	0x40

#define GPMC_ERR_ADDRESS	0x44

#define GPMC_ERR_TYPE		0x48

#define GPMC_CONFIG		0x50

#define GPMC_STATUS		0x54

#define GPMC_PREFETCH_CONFIG1	0x1e0

#define GPMC_PREFETCH_CONFIG2	0x1e4

#define GPMC_PREFETCH_CONTROL	0x1ec

#define GPMC_PREFETCH_STATUS	0x1f0

#define GPMC_ECC_CONFIG		0x1f4

#define GPMC_ECC_CONTROL	0x1f8

#define GPMC_ECC_SIZE_CONFIG	0x1fc

#define GPMC_ECC1_RESULT        0x200

#define GPMC_ECC_BCH_RESULT_0   0x240   
/* not available on OMAP2 */

#define	GPMC_ECC_BCH_RESULT_1	0x244	
/* not available on OMAP2 */

#define	GPMC_ECC_BCH_RESULT_2	0x248	
/* not available on OMAP2 */

#define	GPMC_ECC_BCH_RESULT_3	0x24c	
/* not available on OMAP2 */

#define	GPMC_ECC_BCH_RESULT_4	0x300	
/* not available on OMAP2 */

#define	GPMC_ECC_BCH_RESULT_5	0x304	
/* not available on OMAP2 */

#define	GPMC_ECC_BCH_RESULT_6	0x308	
/* not available on OMAP2 */

/* GPMC ECC control settings */

#define GPMC_ECC_CTRL_ECCCLEAR		0x100

#define GPMC_ECC_CTRL_ECCDISABLE	0x000

#define GPMC_ECC_CTRL_ECCREG1		0x001

#define GPMC_ECC_CTRL_ECCREG2		0x002

#define GPMC_ECC_CTRL_ECCREG3		0x003

#define GPMC_ECC_CTRL_ECCREG4		0x004

#define GPMC_ECC_CTRL_ECCREG5		0x005

#define GPMC_ECC_CTRL_ECCREG6		0x006

#define GPMC_ECC_CTRL_ECCREG7		0x007

#define GPMC_ECC_CTRL_ECCREG8		0x008

#define GPMC_ECC_CTRL_ECCREG9		0x009


#define GPMC_CONFIG_LIMITEDADDRESS		BIT(1)


#define GPMC_STATUS_EMPTYWRITEBUFFERSTATUS	BIT(0)


#define	GPMC_CONFIG2_CSEXTRADELAY		BIT(7)

#define	GPMC_CONFIG3_ADVEXTRADELAY		BIT(7)

#define	GPMC_CONFIG4_OEEXTRADELAY		BIT(7)

#define	GPMC_CONFIG4_WEEXTRADELAY		BIT(23)

#define	GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN	BIT(6)

#define	GPMC_CONFIG6_CYCLE2CYCLESAMECSEN	BIT(7)


#define GPMC_CS0_OFFSET		0x60

#define GPMC_CS_SIZE		0x30

#define	GPMC_BCH_SIZE		0x10

/*
 * The first 1MB of GPMC address space is typically mapped to
 * the internal ROM. Never allocate the first page, to
 * facilitate bug detection; even if we didn't boot from ROM.
 * As GPMC minimum partition size is 16MB we can only start from
 * there.
 */

#define GPMC_MEM_START		0x1000000

#define GPMC_MEM_END		0x3FFFFFFF


#define GPMC_CHUNK_SHIFT	24		
/* 16 MB */

#define GPMC_SECTION_SHIFT	28		
/* 128 MB */


#define CS_NUM_SHIFT		24

#define ENABLE_PREFETCH		(0x1 << 7)

#define DMA_MPU_MODE		2


#define	GPMC_REVISION_MAJOR(l)		((l >> 4) & 0xf)

#define	GPMC_REVISION_MINOR(l)		(l & 0xf)


#define	GPMC_HAS_WR_ACCESS		0x1

#define	GPMC_HAS_WR_DATA_MUX_BUS	0x2

#define	GPMC_HAS_MUX_AAD		0x4


#define GPMC_NR_WAITPINS		4


#define GPMC_CS_CONFIG1		0x00

#define GPMC_CS_CONFIG2		0x04

#define GPMC_CS_CONFIG3		0x08

#define GPMC_CS_CONFIG4		0x0c

#define GPMC_CS_CONFIG5		0x10

#define GPMC_CS_CONFIG6		0x14

#define GPMC_CS_CONFIG7		0x18

#define GPMC_CS_NAND_COMMAND	0x1c

#define GPMC_CS_NAND_ADDRESS	0x20

#define GPMC_CS_NAND_DATA	0x24

/* Control Commands */

#define GPMC_CONFIG_RDY_BSY	0x00000001

#define GPMC_CONFIG_DEV_SIZE	0x00000002

#define GPMC_CONFIG_DEV_TYPE	0x00000003


#define GPMC_CONFIG1_WRAPBURST_SUPP     (1 << 31)

#define GPMC_CONFIG1_READMULTIPLE_SUPP  (1 << 30)

#define GPMC_CONFIG1_READTYPE_ASYNC     (0 << 29)

#define GPMC_CONFIG1_READTYPE_SYNC      (1 << 29)

#define GPMC_CONFIG1_WRITEMULTIPLE_SUPP (1 << 28)

#define GPMC_CONFIG1_WRITETYPE_ASYNC    (0 << 27)

#define GPMC_CONFIG1_WRITETYPE_SYNC     (1 << 27)

#define GPMC_CONFIG1_CLKACTIVATIONTIME(val) ((val & 3) << 25)
/** CLKACTIVATIONTIME Max Ticks */

#define GPMC_CONFIG1_CLKACTIVATIONTIME_MAX 2

#define GPMC_CONFIG1_PAGE_LEN(val)      ((val & 3) << 23)
/** ATTACHEDDEVICEPAGELENGTH Max Value */

#define GPMC_CONFIG1_ATTACHEDDEVICEPAGELENGTH_MAX 2

#define GPMC_CONFIG1_WAIT_READ_MON      (1 << 22)

#define GPMC_CONFIG1_WAIT_WRITE_MON     (1 << 21)

#define GPMC_CONFIG1_WAIT_MON_TIME(val) ((val & 3) << 18)
/** WAITMONITORINGTIME Max Ticks */

#define GPMC_CONFIG1_WAITMONITORINGTIME_MAX  2

#define GPMC_CONFIG1_WAIT_PIN_SEL(val)  ((val & 3) << 16)

#define GPMC_CONFIG1_DEVICESIZE(val)    ((val & 3) << 12)

#define GPMC_CONFIG1_DEVICESIZE_16      GPMC_CONFIG1_DEVICESIZE(1)
/** DEVICESIZE Max Value */

#define GPMC_CONFIG1_DEVICESIZE_MAX     1

#define GPMC_CONFIG1_DEVICETYPE(val)    ((val & 3) << 10)

#define GPMC_CONFIG1_DEVICETYPE_NOR     GPMC_CONFIG1_DEVICETYPE(0)

#define GPMC_CONFIG1_MUXTYPE(val)       ((val & 3) << 8)

#define GPMC_CONFIG1_TIME_PARA_GRAN     (1 << 4)

#define GPMC_CONFIG1_FCLK_DIV(val)      (val & 3)

#define GPMC_CONFIG1_FCLK_DIV2          (GPMC_CONFIG1_FCLK_DIV(1))

#define GPMC_CONFIG1_FCLK_DIV3          (GPMC_CONFIG1_FCLK_DIV(2))

#define GPMC_CONFIG1_FCLK_DIV4          (GPMC_CONFIG1_FCLK_DIV(3))

#define GPMC_CONFIG7_CSVALID		(1 << 6)


#define GPMC_CONFIG7_BASEADDRESS_MASK	0x3f

#define GPMC_CONFIG7_CSVALID_MASK	BIT(6)

#define GPMC_CONFIG7_MASKADDRESS_OFFSET	8

#define GPMC_CONFIG7_MASKADDRESS_MASK	(0xf << GPMC_CONFIG7_MASKADDRESS_OFFSET)
/* All CONFIG7 bits except reserved bits */

#define GPMC_CONFIG7_MASK		(GPMC_CONFIG7_BASEADDRESS_MASK | \
                                         GPMC_CONFIG7_CSVALID_MASK |     \
                                         GPMC_CONFIG7_MASKADDRESS_MASK)


#define GPMC_DEVICETYPE_NOR		0

#define GPMC_DEVICETYPE_NAND		2

#define GPMC_CONFIG_WRITEPROTECT	0x00000010

#define WR_RD_PIN_MONITORING		0x00600000

/* ECC commands */

#define GPMC_ECC_READ		0 
/* Reset Hardware ECC for read */

#define GPMC_ECC_WRITE		1 
/* Reset Hardware ECC for write */

#define GPMC_ECC_READSYN	2 
/* Reset before syndrom is read back */


#define	GPMC_NR_NAND_IRQS	2 
/* number of NAND specific IRQs */


enum gpmc_clk_domain {
	
GPMC_CD_FCLK,
	
GPMC_CD_CLK
};


struct gpmc_cs_data {
	
const char *name;


#define GPMC_CS_RESERVED	(1 << 0)
	
u32 flags;

	
struct resource mem;
};

/* Structure to save gpmc cs context */

struct gpmc_cs_config {
	
u32 config1;
	
u32 config2;
	
u32 config3;
	
u32 config4;
	
u32 config5;
	
u32 config6;
	
u32 config7;
	
int is_valid;
};

/*
 * Structure to save/restore gpmc context
 * to support core off on OMAP3
 */

struct omap3_gpmc_regs {
	
u32 sysconfig;
	
u32 irqenable;
	
u32 timeout_ctrl;
	
u32 config;
	
u32 prefetch_config1;
	
u32 prefetch_config2;
	
u32 prefetch_control;
	
struct gpmc_cs_config cs_context[GPMC_CS_NUM];
};


struct gpmc_device {
	
struct device *dev;
	
int irq;
	
struct irq_chip irq_chip;
	
struct gpio_chip gpio_chip;
	
int nirqs;
};


static struct irq_domain *gpmc_irq_domain;


static struct resource	gpmc_mem_root;

static struct gpmc_cs_data gpmc_cs[GPMC_CS_NUM];
static DEFINE_SPINLOCK(gpmc_mem_lock);
/* Define chip-selects as reserved by default until probe completes */

static unsigned int gpmc_cs_num = GPMC_CS_NUM;

static unsigned int gpmc_nr_waitpins;


static resource_size_t phys_base, mem_size;

static unsigned gpmc_capability;

static void __iomem *gpmc_base;


static struct clk *gpmc_l3_clk;

static irqreturn_t gpmc_handle_irq(int irq, void *dev);



static void gpmc_write_reg(int idx, u32 val)
{
	writel_relaxed(val, gpmc_base + idx);
}

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static u32 gpmc_read_reg(int idx)
{
	return readl_relaxed(gpmc_base + idx);
}

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void gpmc_cs_write_reg(int cs, int idx, u32 val)
{
	void __iomem *reg_addr;

	reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx;
	writel_relaxed(val, reg_addr);
}

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static u32 gpmc_cs_read_reg(int cs, int idx)
{
	void __iomem *reg_addr;

	reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx;
	return readl_relaxed(reg_addr);
}

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/* TODO: Add support for gpmc_fck to clock framework and use it */


static unsigned long gpmc_get_fclk_period(void)
{
	unsigned long rate = clk_get_rate(gpmc_l3_clk);

	rate /= 1000;
	rate = 1000000000 / rate;	/* In picoseconds */

	return rate;
}

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/**
 * gpmc_get_clk_period - get period of selected clock domain in ps
 * @cs Chip Select Region.
 * @cd Clock Domain.
 *
 * GPMC_CS_CONFIG1 GPMCFCLKDIVIDER for cs has to be setup
 * prior to calling this function with GPMC_CD_CLK.
 */


static unsigned long gpmc_get_clk_period(int cs, enum gpmc_clk_domain cd)
{

	unsigned long tick_ps = gpmc_get_fclk_period();
	u32 l;
	int div;

	switch (cd) {
	case GPMC_CD_CLK:
		/* get current clk divider */
		l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
		div = (l & 0x03) + 1;
		/* get GPMC_CLK period */
		tick_ps *= div;
		break;
	case GPMC_CD_FCLK:
		/* FALL-THROUGH */
	default:
		break;
	}

	return tick_ps;

}

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static unsigned int gpmc_ns_to_clk_ticks(unsigned int time_ns, int cs,
					 enum gpmc_clk_domain cd)
{
	unsigned long tick_ps;

	/* Calculate in picosecs to yield more exact results */
	tick_ps = gpmc_get_clk_period(cs, cd);

	return (time_ns * 1000 + tick_ps - 1) / tick_ps;
}

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static unsigned int gpmc_ns_to_ticks(unsigned int time_ns)
{
	return gpmc_ns_to_clk_ticks(time_ns, /* any CS */ 0, GPMC_CD_FCLK);
}

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static unsigned int gpmc_ps_to_ticks(unsigned int time_ps)
{
	unsigned long tick_ps;

	/* Calculate in picosecs to yield more exact results */
	tick_ps = gpmc_get_fclk_period();

	return (time_ps + tick_ps - 1) / tick_ps;
}

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static unsigned int gpmc_clk_ticks_to_ns(unsigned int ticks, int cs,
					 enum gpmc_clk_domain cd)
{
	return ticks * gpmc_get_clk_period(cs, cd) / 1000;
}

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unsigned int gpmc_ticks_to_ns(unsigned int ticks)
{
	return gpmc_clk_ticks_to_ns(ticks, /* any CS */ 0, GPMC_CD_FCLK);
}

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static unsigned int gpmc_ticks_to_ps(unsigned int ticks)
{
	return ticks * gpmc_get_fclk_period();
}

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static unsigned int gpmc_round_ps_to_ticks(unsigned int time_ps)
{
	unsigned long ticks = gpmc_ps_to_ticks(time_ps);

	return ticks * gpmc_get_fclk_period();
}

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static inline void gpmc_cs_modify_reg(int cs, int reg, u32 mask, bool value)
{
	u32 l;

	l = gpmc_cs_read_reg(cs, reg);
	if (value)
		l |= mask;
	else
		l &= ~mask;
	gpmc_cs_write_reg(cs, reg, l);
}

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static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p)
{
	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG1,
			   GPMC_CONFIG1_TIME_PARA_GRAN,
			   p->time_para_granularity);
	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG2,
			   GPMC_CONFIG2_CSEXTRADELAY, p->cs_extra_delay);
	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG3,
			   GPMC_CONFIG3_ADVEXTRADELAY, p->adv_extra_delay);
	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
			   GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay);
	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
			   GPMC_CONFIG4_WEEXTRADELAY, p->we_extra_delay);
	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6,
			   GPMC_CONFIG6_CYCLE2CYCLESAMECSEN,
			   p->cycle2cyclesamecsen);
	gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6,
			   GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN,
			   p->cycle2cyclediffcsen);
}

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#ifdef CONFIG_OMAP_GPMC_DEBUG
/**
 * get_gpmc_timing_reg - read a timing parameter and print DTS settings for it.
 * @cs:      Chip Select Region
 * @reg:     GPMC_CS_CONFIGn register offset.
 * @st_bit:  Start Bit
 * @end_bit: End Bit. Must be >= @st_bit.
 * @ma:x     Maximum parameter value (before optional @shift).
 *           If 0, maximum is as high as @st_bit and @end_bit allow.
 * @name:    DTS node name, w/o "gpmc,"
 * @cd:      Clock Domain of timing parameter.
 * @shift:   Parameter value left shifts @shift, which is then printed instead of value.
 * @raw:     Raw Format Option.
 *           raw format:  gpmc,name = <value>
 *           tick format: gpmc,name = <value> /&zwj;* x ns -- y ns; x ticks *&zwj;/
 *           Where x ns -- y ns result in the same tick value.
 *           When @max is exceeded, "invalid" is printed inside comment.
 * @noval:   Parameter values equal to 0 are not printed.
 * @return:  Specified timing parameter (after optional @shift).
 *
 */


static int get_gpmc_timing_reg(
	/* timing specifiers */
	int cs, int reg, int st_bit, int end_bit, int max,
	const char *name, const enum gpmc_clk_domain cd,
	/* value transform */
	int shift,
	/* format specifiers */
	bool raw, bool noval)
{
	u32 l;
	int nr_bits;
	int mask;
	bool invalid;

	l = gpmc_cs_read_reg(cs, reg);
	nr_bits = end_bit - st_bit + 1;
	mask = (1 << nr_bits) - 1;
	l = (l >> st_bit) & mask;
	if (!max)
		max = mask;
	invalid = l > max;
	if (shift)
		l = (shift << l);
	if (noval && (l == 0))
		return 0;
	if (!raw) {
		/* DTS tick format for timings in ns */
		unsigned int time_ns;
		unsigned int time_ns_min = 0;

		if (l)
			time_ns_min = gpmc_clk_ticks_to_ns(l - 1, cs, cd) + 1;
		time_ns = gpmc_clk_ticks_to_ns(l, cs, cd);
		pr_info("gpmc,%s = <%u>; /* %u ns - %u ns; %i ticks%s*/\n",
			name, time_ns, time_ns_min, time_ns, l,
			invalid ? "; invalid " : " ");
	} else {
		/* raw format */
		pr_info("gpmc,%s = <%u>;%s\n", name, l,
			invalid ? " /* invalid */" : "");
	}

	return l;
}

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#define GPMC_PRINT_CONFIG(cs, config) \
	pr_info("cs%i %s: 0x%08x\n", cs, #config, \
                gpmc_cs_read_reg(cs, config))

#define GPMC_GET_RAW(reg, st, end, field) \
	get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 1, 0)

#define GPMC_GET_RAW_MAX(reg, st, end, max, field) \
	get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, GPMC_CD_FCLK, 0, 1, 0)

#define GPMC_GET_RAW_BOOL(reg, st, end, field) \
	get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 1, 1)

#define GPMC_GET_RAW_SHIFT_MAX(reg, st, end, shift, max, field) \
	get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, GPMC_CD_FCLK, (shift), 1, 1)

#define GPMC_GET_TICKS(reg, st, end, field) \
	get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 0, 0)

#define GPMC_GET_TICKS_CD(reg, st, end, field, cd) \
	get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, (cd), 0, 0, 0)

#define GPMC_GET_TICKS_CD_MAX(reg, st, end, max, field, cd) \
	get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, (cd), 0, 0, 0)



static void gpmc_show_regs(int cs, const char *desc)
{
	pr_info("gpmc cs%i %s:\n", cs, desc);
	GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG1);
	GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG2);
	GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG3);
	GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG4);
	GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG5);
	GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG6);
}

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Tony Lindgren
57
87.69%
1
50.00%
Afzal Mohammed
8
12.31%
1
50.00%
Total
65
100.00%
2
100.00%

/*
 * Note that gpmc,wait-pin handing wrongly assumes bit 8 is available,
 * see commit c9fb809.
 */


static void gpmc_cs_show_timings(int cs, const char *desc)
{
	gpmc_show_regs(cs, desc);

	pr_info("gpmc cs%i access configuration:\n", cs);
	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1,  4,  4, "time-para-granularity");
	GPMC_GET_RAW(GPMC_CS_CONFIG1,  8,  9, "mux-add-data");
	GPMC_GET_RAW_SHIFT_MAX(GPMC_CS_CONFIG1, 12, 13, 1,
			 GPMC_CONFIG1_DEVICESIZE_MAX, "device-width");
	GPMC_GET_RAW(GPMC_CS_CONFIG1, 16, 17, "wait-pin");
	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 21, 21, "wait-on-write");
	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 22, 22, "wait-on-read");
	GPMC_GET_RAW_SHIFT_MAX(GPMC_CS_CONFIG1, 23, 24, 4,
			       GPMC_CONFIG1_ATTACHEDDEVICEPAGELENGTH_MAX,
			       "burst-length");
	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 27, 27, "sync-write");
	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 28, 28, "burst-write");
	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 29, 29, "gpmc,sync-read");
	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 30, 30, "burst-read");
	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 31, 31, "burst-wrap");

	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG2,  7,  7, "cs-extra-delay");

	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG3,  7,  7, "adv-extra-delay");

	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG4, 23, 23, "we-extra-delay");
	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG4,  7,  7, "oe-extra-delay");

	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG6,  7,  7, "cycle2cycle-samecsen");
	GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG6,  6,  6, "cycle2cycle-diffcsen");

	pr_info("gpmc cs%i timings configuration:\n", cs);
	GPMC_GET_TICKS(GPMC_CS_CONFIG2,  0,  3, "cs-on-ns");
	GPMC_GET_TICKS(GPMC_CS_CONFIG2,  8, 12, "cs-rd-off-ns");
	GPMC_GET_TICKS(GPMC_CS_CONFIG2, 16, 20, "cs-wr-off-ns");

	GPMC_GET_TICKS(GPMC_CS_CONFIG3,  0,  3, "adv-on-ns");
	GPMC_GET_TICKS(GPMC_CS_CONFIG3,  8, 12, "adv-rd-off-ns");
	GPMC_GET_TICKS(GPMC_CS_CONFIG3, 16, 20, "adv-wr-off-ns");
	if (gpmc_capability & GPMC_HAS_MUX_AAD) {
		GPMC_GET_TICKS(GPMC_CS_CONFIG3, 4, 6, "adv-aad-mux-on-ns");
		GPMC_GET_TICKS(GPMC_CS_CONFIG3, 24, 26,
				"adv-aad-mux-rd-off-ns");
		GPMC_GET_TICKS(GPMC_CS_CONFIG3, 28, 30,
				"adv-aad-mux-wr-off-ns");
	}

	GPMC_GET_TICKS(GPMC_CS_CONFIG4,  0,  3, "oe-on-ns");
	GPMC_GET_TICKS(GPMC_CS_CONFIG4,  8, 12, "oe-off-ns");
	if (gpmc_capability & GPMC_HAS_MUX_AAD) {
		GPMC_GET_TICKS(GPMC_CS_CONFIG4,  4,  6, "oe-aad-mux-on-ns");
		GPMC_GET_TICKS(GPMC_CS_CONFIG4, 13, 15, "oe-aad-mux-off-ns");
	}
	GPMC_GET_TICKS(GPMC_CS_CONFIG4, 16, 19, "we-on-ns");
	GPMC_GET_TICKS(GPMC_CS_CONFIG4, 24, 28, "we-off-ns");

	GPMC_GET_TICKS(GPMC_CS_CONFIG5,  0,  4, "rd-cycle-ns");
	GPMC_GET_TICKS(GPMC_CS_CONFIG5,  8, 12, "wr-cycle-ns");
	GPMC_GET_TICKS(GPMC_CS_CONFIG5, 16, 20, "access-ns");

	GPMC_GET_TICKS(GPMC_CS_CONFIG5, 24, 27, "page-burst-access-ns");

	GPMC_GET_TICKS(GPMC_CS_CONFIG6, 0, 3, "bus-turnaround-ns");
	GPMC_GET_TICKS(GPMC_CS_CONFIG6, 8, 11, "cycle2cycle-delay-ns");

	GPMC_GET_TICKS_CD_MAX(GPMC_CS_CONFIG1, 18, 19,
			      GPMC_CONFIG1_WAITMONITORINGTIME_MAX,
			      "wait-monitoring-ns", GPMC_CD_CLK);
	GPMC_GET_TICKS_CD_MAX(GPMC_CS_CONFIG1, 25, 26,
			      GPMC_CONFIG1_CLKACTIVATIONTIME_MAX,
			      "clk-activation-ns", GPMC_CD_FCLK);

	GPMC_GET_TICKS(GPMC_CS_CONFIG6, 16, 19, "wr-data-mux-bus-ns");
	GPMC_GET_TICKS(GPMC_CS_CONFIG6, 24, 28, "wr-access-ns");
}
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Tony Lindgren
389
72.04%
2
33.33%
Neil Armstrong
71
13.15%
1
16.67%
Afzal Mohammed
65
12.04%
1
16.67%
Robert ABEL
15
2.78%
2
33.33%
Total
540
100.00%
6
100.00%

#else


static inline void gpmc_cs_show_timings(int cs, const char *desc)
{
}
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Tony Lindgren
9
64.29%
1
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Juha Yrjölä
5
35.71%
1
50.00%
Total
14
100.00%
2
100.00%

#endif

/**
 * set_gpmc_timing_reg - set a single timing parameter for Chip Select Region.
 * Caller is expected to have initialized CONFIG1 GPMCFCLKDIVIDER
 * prior to calling this function with @cd equal to GPMC_CD_CLK.
 *
 * @cs:      Chip Select Region.
 * @reg:     GPMC_CS_CONFIGn register offset.
 * @st_bit:  Start Bit
 * @end_bit: End Bit. Must be >= @st_bit.
 * @max:     Maximum parameter value.
 *           If 0, maximum is as high as @st_bit and @end_bit allow.
 * @time:    Timing parameter in ns.
 * @cd:      Timing parameter clock domain.
 * @name:    Timing parameter name.
 * @return:  0 on success, -1 on error.
 */


static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit, int max,
			       int time, enum gpmc_clk_domain cd, const char *name)
{
	u32 l;
	int ticks, mask, nr_bits;

	if (time == 0)
		ticks = 0;
	else
		ticks = gpmc_ns_to_clk_ticks(time, cs, cd);
	nr_bits = end_bit - st_bit + 1;
	mask = (1 << nr_bits) - 1;

	if (!max)
		max = mask;

	if (ticks > max) {
		pr_err("%s: GPMC CS%d: %s %d ns, %d ticks > %d ticks\n",
		       __func__, cs, name, time, ticks, max);

		return -1;
	}

	l = gpmc_cs_read_reg(cs, reg);
#ifdef CONFIG_OMAP_GPMC_DEBUG
	pr_info(
		"GPMC CS%d: %-17s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n",
	       cs, name, ticks, gpmc_get_clk_period(cs, cd) * ticks / 1000,
			(l >> st_bit) & mask, time);
#endif
	l &= ~(mask << st_bit);
	l |= ticks << st_bit;
	gpmc_cs_write_reg(cs, reg, l);

	return 0;
}

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Juha Yrjölä
123
63.40%
1
12.50%
Robert ABEL
32
16.49%
4
50.00%
Roger Quadros
22
11.34%
1
12.50%
David Brownell
16
8.25%
1
12.50%
Tony Lindgren
1
0.52%
1
12.50%
Total
194
100.00%
8
100.00%


#define GPMC_SET_ONE_CD_MAX(reg, st, end, max, field, cd)  \
	if (set_gpmc_timing_reg(cs, (reg), (st), (end), (max), \
            t->field, (cd), #field) < 0)                       \
                return -1


#define GPMC_SET_ONE(reg, st, end, field) \
	GPMC_SET_ONE_CD_MAX(reg, st, end, 0, field, GPMC_CD_FCLK)

/**
 * gpmc_calc_waitmonitoring_divider - calculate proper GPMCFCLKDIVIDER based on WAITMONITORINGTIME
 * WAITMONITORINGTIME will be _at least_ as long as desired, i.e.
 * read  --> don't sample bus too early
 * write --> data is longer on bus
 *
 * Formula:
 * gpmc_clk_div + 1 = ceil(ceil(waitmonitoringtime_ns / gpmc_fclk_ns)
 *                    / waitmonitoring_ticks)
 * WAITMONITORINGTIME resulting in 0 or 1 tick with div = 1 are caught by
 * div <= 0 check.
 *
 * @wait_monitoring: WAITMONITORINGTIME in ns.
 * @return:          -1 on failure to scale, else proper divider > 0.
 */


static int gpmc_calc_waitmonitoring_divider(unsigned int wait_monitoring)
{

	int div = gpmc_ns_to_ticks(wait_monitoring);

	div += GPMC_CONFIG1_WAITMONITORINGTIME_MAX - 1;
	div /= GPMC_CONFIG1_WAITMONITORINGTIME_MAX;

	if (div > 4)
		return -1;
	if (div <= 0)
		div = 1;

	return div;

}

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Robert ABEL
36
70.59%
1
50.00%
Juha Yrjölä
15
29.41%
1
50.00%
Total
51
100.00%
2
100.00%

/**
 * gpmc_calc_divider - calculate GPMC_FCLK divider for sync_clk GPMC_CLK period.
 * @sync_clk: GPMC_CLK period in ps.
 * @return:   Returns at least 1 if GPMC_FCLK can be divided to GPMC_CLK.
 *            Else, returns -1.
 */


int gpmc_calc_divider(unsigned int sync_clk)
{
	int div = gpmc_ps_to_ticks(sync_clk);

	if (div > 4)
		return -1;
	if (div <= 0)
		div = 1;

	return div;
}

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Juha Yrjölä
23
57.50%
1
33.33%
Robert ABEL
16
40.00%
1
33.33%
David Brownell
1
2.50%
1
33.33%
Total
40
100.00%
3
100.00%

/**
 * gpmc_cs_set_timings - program timing parameters for Chip Select Region.
 * @cs:     Chip Select Region.
 * @t:      GPMC timing parameters.
 * @s:      GPMC timing settings.
 * @return: 0 on success, -1 on error.
 */


int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
			const struct gpmc_settings *s)
{
	int div;
	u32 l;

	div = gpmc_calc_divider(t->sync_clk);
	if (div < 0)
		return div;

	/*
         * See if we need to change the divider for waitmonitoringtime.
         *
         * Calculate GPMCFCLKDIVIDER independent of gpmc,sync-clk-ps in DT for
         * pure asynchronous accesses, i.e. both read and write asynchronous.
         * However, only do so if WAITMONITORINGTIME is actually used, i.e.
         * either WAITREADMONITORING or WAITWRITEMONITORING is set.
         *
         * This statement must not change div to scale async WAITMONITORINGTIME
         * to protect mixed synchronous and asynchronous accesses.
         *
         * We raise an error later if WAITMONITORINGTIME does not fit.
         */
	if (!s->sync_read && !s->sync_write &&
	    (s->wait_on_read || s->wait_on_write)
	   ) {

		div = gpmc_calc_waitmonitoring_divider(t->wait_monitoring);
		if (div < 0) {
			pr_err("%s: waitmonitoringtime %3d ns too large for greatest gpmcfclkdivider.\n",
			       __func__,
			       t->wait_monitoring
			       );
			return -1;
		}
	}

	GPMC_SET_ONE(GPMC_CS_CONFIG2,  0,  3, cs_on);
	GPMC_SET_ONE(GPMC_CS_CONFIG2,  8, 12, cs_rd_off);
	GPMC_SET_ONE(GPMC_CS_CONFIG2, 16, 20, cs_wr_off);

	GPMC_SET_ONE(GPMC_CS_CONFIG3,  0,  3, adv_on);
	GPMC_SET_ONE(GPMC_CS_CONFIG3,  8, 12, adv_rd_off);
	GPMC_SET_ONE(GPMC_CS_CONFIG3, 16, 20, adv_wr_off);
	if (gpmc_capability & GPMC_HAS_MUX_AAD) {
		GPMC_SET_ONE(GPMC_CS_CONFIG3,  4,  6, adv_aad_mux_on);
		GPMC_SET_ONE(GPMC_CS_CONFIG3, 24, 26, adv_aad_mux_rd_off);
		GPMC_SET_ONE(GPMC_CS_CONFIG3, 28, 30, adv_aad_mux_wr_off);
	}

	GPMC_SET_ONE(GPMC_CS_CONFIG4,  0,  3, oe_on);
	GPMC_SET_ONE(GPMC_CS_CONFIG4,  8, 12, oe_off);
	if (gpmc_capability & GPMC_HAS_MUX_AAD) {
		GPMC_SET_ONE(GPMC_CS_CONFIG4,  4,  6, oe_aad_mux_on);
		GPMC_SET_ONE(GPMC_CS_CONFIG4, 13, 15, oe_aad_mux_off);
	}
	GPMC_SET_ONE(GPMC_CS_CONFIG4, 16, 19, we_on);
	GPMC_SET_ONE(GPMC_CS_CONFIG4, 24, 28, we_off);

	GPMC_SET_ONE(GPMC_CS_CONFIG5,  0,  4, rd_cycle);
	GPMC_SET_ONE(GPMC_CS_CONFIG5,  8, 12, wr_cycle);
	GPMC_SET_ONE(GPMC_CS_CONFIG5, 16, 20, access);

	GPMC_SET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access);

	GPMC_SET_ONE(GPMC_CS_CONFIG6, 0, 3, bus_turnaround);
	GPMC_SET_ONE(GPMC_CS_CONFIG6, 8, 11, cycle2cycle_delay);

	if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
		GPMC_SET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus);
	if (gpmc_capability & GPMC_HAS_WR_ACCESS)
		GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access);

	l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
	l &= ~0x03;
	l |= (div - 1);
	gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l);

	GPMC_SET_ONE_CD_MAX(GPMC_CS_CONFIG1, 18, 19,
			    GPMC_CONFIG1_WAITMONITORINGTIME_MAX,
			    wait_monitoring, GPMC_CD_CLK);
	GPMC_SET_ONE_CD_MAX(GPMC_CS_CONFIG1, 25, 26,
			    GPMC_CONFIG1_CLKACTIVATIONTIME_MAX,
			    clk_activation, GPMC_CD_FCLK);

#ifdef CONFIG_OMAP_GPMC_DEBUG
	pr_info("GPMC CS%d CLK period is %lu ns (div %d)\n",
			cs, (div * gpmc_get_fclk_period()) / 1000, div);
#endif

	gpmc_cs_bool_timings(cs, &t->bool_timings);
	gpmc_cs_show_timings(cs, "after gpmc_cs_set_timings");

	return 0;
}

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Juha Yrjölä
207
42.59%
2
13.33%
Robert ABEL
116
23.87%
4
26.67%
Neil Armstrong
71
14.61%
1
6.67%
Afzal Mohammed
42
8.64%
3
20.00%
Syed Mohammed Khasim
25
5.14%
1
6.67%
David Brownell
16
3.29%
1
6.67%
Tony Lindgren
8
1.65%
2
13.33%
Paul Walmsley
1
0.21%
1
6.67%
Total
486
100.00%
15
100.00%



static int gpmc_cs_set_memconf(int cs, u32 base, u32 size)
{
	u32 l;
	u32 mask;

	/*
         * Ensure that base address is aligned on a
         * boundary equal to or greater than size.
         */
	if (base & (size - 1))
		return -EINVAL;

	base >>= GPMC_CHUNK_SHIFT;
	mask = (1 << GPMC_SECTION_SHIFT) - size;
	mask >>= GPMC_CHUNK_SHIFT;
	mask <<= GPMC_CONFIG7_MASKADDRESS_OFFSET;

	l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
	l &= ~GPMC_CONFIG7_MASK;
	l |= base & GPMC_CONFIG7_BASEADDRESS_MASK;
	l |= mask & GPMC_CONFIG7_MASKADDRESS_MASK;
	l |= GPMC_CONFIG7_CSVALID;
	gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);

	return 0;
}

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CommitProp
Imre Deak
49
49.00%
1
16.67%
Jon Hunter
19
19.00%
1
16.67%
Sam Protsenko
16
16.00%
1
16.67%
Juha Yrjölä
14
14.00%
1
16.67%
Rajendra Nayak
1
1.00%
1
16.67%
Roger Quadros
1
1.00%
1
16.67%
Total
100
100.00%
6
100.00%



static void gpmc_cs_enable_mem(int cs)
{
	u32 l;

	l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
	l |= GPMC_CONFIG7_CSVALID;
	gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
}

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Roger Quadros
34
100.00%
1
100.00%
Total
34
100.00%
1
100.00%



static void gpmc_cs_disable_mem(int cs)
{
	u32 l;

	l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
	l &= ~GPMC_CONFIG7_CSVALID;
	gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
}

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Juha Yrjölä
20
57.14%
1
33.33%
Imre Deak
14
40.00%
1
33.33%
Rajendra Nayak
1
2.86%
1
33.33%
Total
35
100.00%
3
100.00%



static void gpmc_cs_get_memconf(int cs, u32 *base, u32 *size)
{
	u32 l;
	u32 mask;

	l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
	*base = (l & 0x3f) << GPMC_CHUNK_SHIFT;
	mask = (l >> 8) & 0x0f;
	*size = (1 << GPMC_SECTION_SHIFT) - (mask << GPMC_CHUNK_SHIFT);
}

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Imre Deak
52
76.47%
1
50.00%
Juha Yrjölä
16
23.53%
1
50.00%
Total
68
100.00%
2
100.00%



static int gpmc_cs_mem_enabled(int cs)
{
	u32 l;

	l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
	return l & GPMC_CONFIG7_CSVALID;
}

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Imre Deak
25
96.15%
1
50.00%
Rajendra Nayak
1
3.85%
1
50.00%
Total
26
100.00%
2
100.00%



static void gpmc_cs_set_reserved(int cs, int reserved)
{
	struct gpmc_cs_data *gpmc = &gpmc_cs[cs];

	gpmc->flags |= GPMC_CS_RESERVED;
}

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Tony Lindgren
14
48.28%
1
25.00%
Imre Deak
13
44.83%
1
25.00%
Ezequiel García
2
6.90%
2
50.00%
Total
29
100.00%
4
100.00%



static bool gpmc_cs_reserved(int cs)
{
	struct gpmc_cs_data *gpmc = &gpmc_cs[cs];

	return gpmc->flags & GPMC_CS_RESERVED;
}

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Tony Lindgren
17
62.96%
1
25.00%
Imre Deak
8
29.63%
1
25.00%
Ezequiel García
2
7.41%
2
50.00%
Total
27
100.00%
4
100.00%



static void gpmc_cs_set_name(int cs, const char *name)
{
	struct gpmc_cs_data *gpmc = &gpmc_cs[cs];

	gpmc->name = name;
}

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Tony Lindgren
30
96.77%
1
50.00%
Imre Deak
1
3.23%
1
50.00%
Total
31
100.00%
2
100.00%



static const char *gpmc_cs_get_name(int cs)
{
	struct gpmc_cs_data *gpmc = &gpmc_cs[cs];

	return gpmc->name;
}

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Tony Lindgren
24
88.89%
1
33.33%
Imre Deak
2
7.41%
1
33.33%
Sam Protsenko
1
3.70%
1
33.33%
Total
27
100.00%
3
100.00%



static unsigned long gpmc_mem_align(unsigned long size)
{
	int order;

	size = (size - 1) >> (GPMC_CHUNK_SHIFT - 1);
	order = GPMC_CHUNK_SHIFT - 1;
	do {
		size >>= 1;
		order++;
	} while (size);
	size = 1 << order;
	return size;
}

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100.00%
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58
100.00%
1
100.00%



static int gpmc_cs_insert_mem(int cs, unsigned long base, unsigned long size)
{
	struct gpmc_cs_data *gpmc = &gpmc_cs[cs];
	struct resource *res = &gpmc->mem;
	int r;

	size = gpmc_mem_align(size);
	spin_lock(&gpmc_mem_lock);
	res->start = base;
	res->end = base + size - 1;
	r = request_resource(&gpmc_mem_root, res);
	spin_unlock(&gpmc_mem_lock);

	return r;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Imre Deak
76
85.39%
1
50.00%
Tony Lindgren
13
14.61%
1
50.00%
Total
89
100.00%
2
100.00%



static int gpmc_cs_delete_mem(int cs)
{
	struct gpmc_cs_data *gpmc = &gpmc_cs[cs];
	struct resource *res = &gpmc->mem;
	int r;

	spin_lock(&gpmc_mem_lock);
	r = release_resource(res);
	res->start = 0;
	res->end = 0;
	spin_unlock(&gpmc_mem_lock);

	return r;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Afzal Mohammed
53
79.10%
1
33.33%
Tony Lindgren
14
20.90%
2
66.67%
Total
67
100.00%
3
100.00%

/**
 * gpmc_cs_remap - remaps a chip-select physical base address
 * @cs:         chip-select to remap
 * @base:       physical base address to re-map chip-select to
 *
 * Re-maps a chip-select to a new physical base address specified by
 * "base". Returns 0 on success and appropriate negative error code
 * on failure.
 */


static int gpmc_cs_remap(int cs, u32 base)
{
	int ret;
	u32 old_base, size;

	if (cs > gpmc_cs_num) {
		pr_err("%s: requested chip-select is disabled\n", __func__);
		return -ENODEV;
	}

	/*
         * Make sure we ignore any device offsets from the GPMC partition
         * allocated for the chip select and that the new base confirms
         * to the GPMC 16MB minimum granularity.
         */ 
	base &= ~(SZ_16M - 1);

	gpmc_cs_get_memconf(cs, &old_base, &size);
	if (base == old_base)
		return 0;

	ret = gpmc_cs_delete_mem(cs);
	if (ret < 0)
		return ret;

	ret = gpmc_cs_insert_mem(cs, base, size);
	if (ret < 0)
		return ret;

	ret = gpmc_cs_set_memconf(cs, base, size);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jon Hunter
98
82.35%
2
40.00%
Tony Lindgren
10
8.40%
1
20.00%
Gupta Pekon
10
8.40%
1
20.00%
Roger Quadros
1
0.84%
1
20.00%
Total
119
100.00%
5
100.00%



int gpmc_cs_request(int cs, unsigned long size, unsigned long *base)
{
	struct gpmc_cs_data *gpmc = &gpmc_cs[cs];
	struct resource *res = &gpmc->mem;
	int r = -1;

	if (cs > gpmc_cs_num) {
		pr_err("%s: requested chip-select is disabled\n", __func__);
		return -ENODEV;
	}
	size = gpmc_mem_align(size);
	if (size > (1 << GPMC_SECTION_SHIFT))
		return -ENOMEM;

	spin_lock(&gpmc_mem_lock);
	if (gpmc_cs_reserved(cs)) {
		r = -EBUSY;
		goto out;
	}
	if (gpmc_cs_mem_enabled(cs))
		r = adjust_resource(res, res->start & ~(size - 1), size);
	if (r < 0)
		r = allocate_resource(&gpmc_mem_root, res, size, 0, ~0,
				      size, NULL, NULL);
	if (r < 0)
		goto out;

	/* Disable CS while changing base address and size mask */
	gpmc_cs_disable_mem(cs);

	r = gpmc_cs_set_memconf(cs, res->start, resource_size(res));
	if (r < 0) {
		release_resource(res);
		goto out;
	}

	/* Enable CS */
	gpmc_cs_enable_mem(cs);
	*base = res->start;
	gpmc_cs_set_reserved(cs, 1);
out:
	spin_unlock(&gpmc_mem_lock);
	return r;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Imre Deak
184
76.35%
1
16.67%
Jon Hunter
18
7.47%
1
16.67%
Roger Quadros
13
5.39%
1
16.67%
Tony Lindgren
13
5.39%
1
16.67%
Gupta Pekon
10
4.15%
1
16.67%
Tobias Klauser
3
1.24%
1
16.67%
Total
241
100.00%
6
100.00%


EXPORT_SYMBOL(gpmc_cs_request);



void gpmc_cs_free(int cs)
{
	struct gpmc_cs_data *gpmc = &gpmc_cs[cs];
	struct resource *res = &gpmc->mem;

	spin_lock(&gpmc_mem_lock);
	if (cs >= gpmc_cs_num || cs < 0 || !gpmc_cs_reserved(cs)) {
		printk(KERN_ERR "Trying to free non-reserved GPMC CS%d\n", cs);
		BUG();
		spin_unlock(&gpmc_mem_lock);
		return;
	}
	gpmc_cs_disable_mem(cs);
	if (res->flags)
		release_resource(res);
	gpmc_cs_set_reserved(cs, 0);
	spin_unlock(&gpmc_mem_lock);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Imre Deak
67
67.00%
1
20.00%
Tony Lindgren
28
28.00%
2
40.00%
Roel Kluin
4
4.00%
1
20.00%
Gupta Pekon
1
1.00%
1
20.00%
Total
100
100.00%
5
100.00%


EXPORT_SYMBOL(gpmc_cs_free);

/**
 * gpmc_configure - write request to configure gpmc
 * @cmd: command type
 * @wval: value to write
 * @return status of the operation
 */


int gpmc_configure(int cmd, int wval)
{
	u32 regval;

	switch (cmd) {
	case GPMC_CONFIG_WP:
		regval = gpmc_read_reg(GPMC_CONFIG);
		if (wval)
			regval &= ~GPMC_CONFIG_WRITEPROTECT; /* WP is ON */
		else
			regval |= GPMC_CONFIG_WRITEPROTECT;  /* WP is OFF */
		gpmc_write_reg(GPMC_CONFIG, regval);
		break;

	default:
		pr_err("%s: command not supported\n", __func__);
		return -EINVAL;
	}

	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Sukumar Ghorai
53
76.81%
1
33.33%
Vimal Singh
8
11.59%
1
33.33%
Jon Hunter
8
11.59%
1
33.33%
Total
69
100.00%
3
100.00%


EXPORT_SYMBOL(gpmc_configure);



void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
{
	int i;

	reg->gpmc_status = NULL;	/* deprecated */
	reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET +
				GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs;
	reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET +
				GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs;
	reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET +
				GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs;
	reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1;
	reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2;
	reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL;
	reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS;
	reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG;
	reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL;
	reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG;
	reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT;

	for (i = 0; i < GPMC_BCH_NUM_REMAINDER; i++) {
		reg->gpmc_bch_result0[i] = gpmc_base + GPMC_ECC_BCH_RESULT_0 +
					   GPMC_BCH_SIZE * i;
		reg->gpmc_bch_result1[i] = gpmc_base + GPMC_ECC_BCH_RESULT_1 +
					   GPMC_BCH_SIZE * i;
		reg->gpmc_bch_result2[i] = gpmc_base + GPMC_ECC_BCH_RESULT_2 +
					   GPMC_BCH_SIZE * i;
		reg->gpmc_bch_result3[i] = gpmc_base + GPMC_ECC_BCH_RESULT_3 +
					   GPMC_BCH_SIZE * i;
		reg->gpmc_bch_result4[i] = gpmc_base + GPMC_ECC_BCH_RESULT_4 +
					   i * GPMC_BCH_SIZE;
		reg->gpmc_bch_result5[i] = gpmc_base + GPMC_ECC_BCH_RESULT_5 +
					   i * GPMC_BCH_SIZE;
		reg->gpmc_bch_result6[i] = gpmc_base + GPMC_ECC_BCH_RESULT_6 +
					   i * GPMC_BCH_SIZE;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Afzal Mohammed
176
70.68%
2
18.18%
Gupta Pekon
45
18.07%
1
9.09%
Sukumar Ghorai
16
6.43%
2
18.18%
Jon Hunter
4
1.61%
1
9.09%
Imre Deak
3
1.20%
1
9.09%
Roger Quadros
2
0.80%
1
9.09%
Paul Walmsley
1
0.40%
1
9.09%
Juha Yrjölä
1
0.40%
1
9.09%
Olof Johansson
1
0.40%
1
9.09%
Total
249
100.00%
11
100.00%



static bool gpmc_nand_writebuffer_empty(void)
{
	if (gpmc_read_reg(GPMC_STATUS) & GPMC_STATUS_EMPTYWRITEBUFFERSTATUS)
		return true;

	return false;
}

Contributors
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Roger Quadros
23
100.00%
1
100.00%
Total
23
100.00%
1
100.00%


static struct gpmc_nand_ops nand_ops = {
	.nand_writebuffer_empty = gpmc_nand_writebuffer_empty,
};

/**
 * gpmc_omap_get_nand_ops - Get the GPMC NAND interface
 * @regs: the GPMC NAND register map exclusive for NAND use.
 * @cs: GPMC chip select number on which the NAND sits. The
 *      register map returned will be specific to this chip select.
 *
 * Returns NULL on error e.g. invalid cs.
 */


struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *reg, int cs)
{
	if (cs >= gpmc_cs_num)
		return NULL;

	gpmc_update_nand_reg(reg, cs);

	return &nand_ops;
}
Contributors
Person
Tokens
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CommitProp
Roger Quadros
35
100.00%
1
100.00%
Total
35
100.00%
1
100.00%


EXPORT_SYMBOL_GPL(gpmc_omap_get_nand_ops);



int gpmc_get_client_irq(unsigned irq_config)
{
	if (!gpmc_irq_domain) {
		pr_warn("%s called before GPMC IRQ domain available\n",
			__func__);
		return 0;
	}

	/* we restrict this to NAND IRQs only */
	if (irq_config >= GPMC_NR_NAND_IRQS)
		return 0;

	return irq_create_mapping(gpmc_irq_domain, irq_config);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Quadros
20
46.51%
2
33.33%
Afzal Mohammed
18
41.86%
2
33.33%
Sukumar Ghorai
5
11.63%
2
33.33%
Total
43
100.00%
6
100.00%



static int gpmc_irq_endis(unsigned long hwirq, bool endis)
{
	u32 regval;

	/* bits GPMC_NR_NAND_IRQS to 8 are reserved */
	if (hwirq >= GPMC_NR_NAND_IRQS)
		hwirq += 8 - GPMC_NR_NAND_IRQS;

	regval = gpmc_read_reg(GPMC_IRQENABLE);
	if (endis)
		regval |= BIT(hwirq);
	else
		regval &= ~BIT(hwirq);
	gpmc_write_reg(GPMC_IRQENABLE, regval);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Afzal Mohammed
23
34.85%
2
28.57%
Roger Quadros
23
34.85%
2
28.57%
Sukumar Ghorai
19
28.79%
2
28.57%
Juha Yrjölä
1
1.52%
1
14.29%
Total
66
100.00%
7
100.00%



static void gpmc_irq_disable(struct irq_data *p)
{
	gpmc_irq_endis(p->hwirq, false);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Afzal Mohammed
16
80.00%
1
33.33%
Vimal Singh
3
15.00%
1
33.33%
Roger Quadros
1
5.00%
1
33.33%
Total
20
100.00%
3
100.00%



static void gpmc_irq_enable(struct irq_data *p)
{
	gpmc_irq_endis(p->hwirq, true);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Afzal Mohammed
13
65.00%
2
40.00%
Imre Deak
4
20.00%
1
20.00%
Rajendra Nayak
2
10.00%
1
20.00%
Roger Quadros
1
5.00%
1
20.00%
Total
20
100.00%
5
100.00%



static void gpmc_irq_mask(struct irq_data *d)
{
	gpmc_irq_endis(d->hwirq, false);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Quadros
13
65.00%
1
33.33%
Afzal Mohammed
6
30.00%
1
33.33%
Rajendra Nayak
1
5.00%
1
33.33%
Total
20
100.00%
3
100.00%



static void gpmc_irq_unmask(struct irq_data *d)
{
	gpmc_irq_endis(d->hwirq, true);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Quadros
19
95.00%
1
50.00%
Afzal Mohammed
1
5.00%
1
50.00%
Total
20
100.00%
2
100.00%



static void gpmc_irq_edge_config(unsigned long hwirq, bool rising_edge)
{
	u32 regval;

	/* NAND IRQs polarity is not configurable */
	if (hwirq < GPMC_NR_NAND_IRQS)
		return;

	/* WAITPIN starts at BIT 8 */
	hwirq += 8 - GPMC_NR_NAND_IRQS;

	regval = gpmc_read_reg(GPMC_CONFIG);
	if (rising_edge)
		regval &= ~BIT(hwirq);
	else
		regval |= BIT(hwirq);

	gpmc_write_reg(GPMC_CONFIG, regval);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Quadros
64
98.46%
1
50.00%
Afzal Mohammed
1
1.54%
1
50.00%
Total
65
100.00%
2
100.00%



static void gpmc_irq_ack(struct irq_data *d)
{
	unsigned int hwirq = d->hwirq;

	/* skip reserved bits */
	if (hwirq >= GPMC_NR_NAND_IRQS)
		hwirq += 8 - GPMC_NR_NAND_IRQS;

	/* Setting bit to 1 clears (or Acks) the interrupt */
	gpmc_write_reg(GPMC_IRQSTATUS, BIT(hwirq));
}

Contributors
Person
Tokens
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Commits
CommitProp
Roger Quadros
43
100.00%
1
100.00%
Total
43
100.00%
1
100.00%



static int gpmc_irq_set_type(struct irq_data *d, unsigned int trigger)
{
	/* can't set type for NAND IRQs */
	if (d->hwirq < GPMC_NR_NAND_IRQS)
		return -EINVAL;

	/* We can support either rising or falling edge at a time */
	if (trigger == IRQ_TYPE_EDGE_FALLING)
		gpmc_irq_edge_config(d->hwirq, false);
	else if (trigger == IRQ_TYPE_EDGE_RISING)
		gpmc_irq_edge_config(d->hwirq, true);
	else
		return -EINVAL;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Quadros
57
83.82%
1
50.00%
Afzal Mohammed
11
16.18%
1
50.00%
Total
68
100.00%
2
100.00%



static int gpmc_irq_map(struct irq_domain *d, unsigned int virq,
			irq_hw_number_t hw)
{
	struct gpmc_device *gpmc = d->host_data;

	irq_set_chip_data(virq, gpmc);
	if (hw < GPMC_NR_NAND_IRQS) {
		irq_modify_status(virq, IRQ_NOREQUEST, IRQ_NOAUTOEN);
		irq_set_chip_and_handler(virq, &gpmc->irq_chip,
					 handle_simple_irq);
	} else {
		irq_set_chip_and_handler(virq, &gpmc->irq_chip,
					 handle_edge_irq);
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Quadros
63
77.78%
2
40.00%
Afzal Mohammed
10
12.35%
1
20.00%
Rajendra Nayak
6
7.41%
1
20.00%
Felipe Balbi
2
2.47%
1
20.00%
Total
81
100.00%
5
100.00%


static const struct irq_domain_ops gpmc_irq_domain_ops = {
	.map    = gpmc_irq_map,
	.xlate  = irq_domain_xlate_twocell,
};



static irqreturn_t gpmc_handle_irq(int irq, void *data)
{
	int hwirq, virq;
	u32 regval, regvalx;
	struct gpmc_device *gpmc = data;

	regval = gpmc_read_reg(GPMC_IRQSTATUS);
	regvalx = regval;

	if (!regval)
		return IRQ_NONE;

	for (hwirq = 0; hwirq < gpmc->nirqs; hwirq++) {
		/* skip reserved status bits */
		if (hwirq == GPMC_NR_NAND_IRQS)
			regvalx >>= 8 - GPMC_NR_NAND_IRQS;

		if (regvalx & BIT(hwirq)) {
			virq = irq_find_mapping(gpmc_irq_domain, hwirq);
			if (!virq) {
				dev_warn(gpmc->dev,
					 "spurious irq detected hwirq %d, virq %d\n",
					 hwirq, virq);
			}

			generic_handle_irq(virq);
		}
	}

	gpmc_write_reg(GPMC_IRQSTATUS, regval);

	return IRQ_HANDLED;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Quadros
110
82.09%
2
33.33%
Rajendra Nayak
14
10.45%
1
16.67%
Afzal Mohammed
9
6.72%
2
33.33%
Rob Herring
1
0.75%
1
16.67%
Total
134
100.00%
6
100.00%



static int gpmc_setup_irq(struct gpmc_device *gpmc)
{
	u32 regval;
	int rc;

	/* Disable interrupts */
	gpmc_write_reg(GPMC_IRQENABLE, 0);

	/* clear interrupts */
	regval = gpmc_read_reg(GPMC_IRQSTATUS);
	gpmc_write_reg(GPMC_IRQSTATUS, regval);

	gpmc->irq_chip.name = "gpmc";
	gpmc->irq_chip.irq_enable = gpmc_irq_enable;
	gpmc->irq_chip.irq_disable = gpmc_irq_disable;
	gpmc->irq_chip.irq_ack = gpmc_irq_ack;
	gpmc->irq_chip.irq_mask = gpmc_irq_mask;
	gpmc->irq_chip.irq_unmask = gpmc_irq_unmask;
	gpmc->irq_chip.irq_set_type = gpmc_irq_set_type;

	gpmc_irq_domain = irq_domain_add_linear(gpmc->dev->of_node,
						gpmc->nirqs,
						&gpmc_irq_domain_ops,
						gpmc);
	if (!gpmc_irq_domain) {
		dev_err(gpmc->dev, "IRQ domain add failed\n");
		return -ENODEV;
	}

	rc = request_irq(gpmc->irq, gpmc_handle_irq, 0, "gpmc", gpmc);
	if (rc) {
		dev_err(gpmc->dev, "failed to request irq %d: %d\n",
			gpmc->irq, rc);
		irq_domain_remove(gpmc_irq_domain);
		gpmc_irq_domain = NULL;
	}

	return rc;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Quadros
150
80.65%
2
40.00%
Afzal Mohammed
26
13.98%
2
40.00%
Rajendra Nayak
10
5.38%
1
20.00%
Total
186
100.00%
5
100.00%



static int gpmc_free_irq(struct gpmc_device *gpmc)
{
	int hwirq;

	free_irq(gpmc->irq, gpmc);

	for (hwirq = 0; hwirq < gpmc->nirqs; hwirq++)
		irq_dispose_mapping(irq_find_mapping(gpmc_irq_domain, hwirq));

	irq_domain_remove(gpmc_irq_domain);
	gpmc_irq_domain = NULL;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Roger Quadros
26
43.33%
2
33.33%
Afzal Mohammed
18
30.00%
2
33.33%
Imre Deak
8
13.33%
1
16.67%
Rajendra Nayak
8
13.33%
1
16.67%
Total
60
100.00%
6
100.00%



static void gpmc_mem_exit(void)
{
	int cs;

	for (cs = 0; cs < gpmc_cs_num; cs++) {
		if (!gpmc_cs_mem_enabled(cs))
			continue;
		gpmc_cs_delete_mem(cs);
	}

}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Afzal Mohammed
31
77.50%
2
50.00%
Rajendra Nayak
8
20.00%
1
25.00%
Gupta Pekon
1
2.50%
1
25.00%
Total
40
100.00%
4
100.00%



static void gpmc_mem_init(void)
{
	int cs;

	gpmc_mem_root.start = GPMC_MEM_START;
	gpmc_mem_root.end = GPMC_MEM_END;

	/* Reserve all regions that has been set up by bootloader */
	for (cs = 0; cs < gpmc_cs_num; cs++) {
		u32 base, size;

		if (!gpmc_cs_mem_enabled(cs))
			continue;
		gpmc_cs_get_memconf(cs, &base, &size);
		if (gpmc_cs_insert_mem(cs, base, size)) {
			pr_warn("%s: disabling cs %d mapped at 0x%x-0x%x\n",
				__func__, cs, base, base + size);
			gpmc_cs_disable_mem(cs);
		}
	}
}

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static u32 gpmc_round_ps_to_sync_clk(u32 time_ps, u32 sync_clk)
{
	u32 temp;
	int div;

	div = gpmc_calc_divider(sync_clk);
	temp = gpmc_ps_to_ticks(time_ps);
	temp = (temp + div - 1) / div;
	return gpmc_ticks_to_ps(temp * div);
}

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/* XXX: can the cycles be avoided ? */


static int gpmc_calc_sync_read_timings(struct gpmc_timings *gpmc_t,
				       struct gpmc_device_timings *dev_t,
				       bool mux)
{
	u32 temp;

	/* adv_rd_off */
	temp = dev_t->t_avdp_r;
	/* XXX: mux check required ? */
	if (mux) {
		/* XXX: t_avdp not to be required for sync, only added for tusb
                 * this indirectly necessitates requirement of t_avdp_r and
                 * t_avdp_w instead of having a single t_avdp
                 */
		temp = max_t(u32, temp,	gpmc_t->clk_activation + dev_t->t_avdh);
		temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
	}
	gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp);

	/* oe_on */
	temp = dev_t->t_oeasu; /* XXX: remove this ? */
	if (mux) {
		temp = max_t(u32, temp,	gpmc_t->clk_activation + dev_t->t_ach);
		temp = max_t(u32, temp, gpmc_t->adv_rd_off +
				gpmc_ticks_to_ps(dev_t->cyc_aavdh_oe));
	}
	gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp);

	/* access */
	/* XXX: any scope for improvement ?, by combining oe_on
         * and clk_activation, need to check whether
         * access = clk_activation + round to sync clk ?
         */
	temp = max_t(u32, dev_t->t_iaa,	dev_t->cyc_iaa * gpmc_t->sync_clk);
	temp += gpmc_t->clk_activation;
	if (dev_t->cyc_oe)
		temp = max_t(u32, temp, gpmc_t->oe_on +
				gpmc_ticks_to_ps(dev_t->cyc_oe));
	gpmc_t->access = gpmc_round_ps_to_ticks(temp);

	gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1);
	gpmc_t->cs_rd_off = gpmc_t->oe_off;

	/* rd_cycle */
	temp = max_t(u32, dev_t->t_cez_r, dev_t->t_oez);
	temp = gpmc_round_ps_to_sync_clk(temp, gpmc_t->sync_clk) +
							gpmc_t->access;
	/* XXX: barter t_ce_rdyz with t_cez_r ? */
	if (dev_t->t_ce_rdyz)
		temp = max_t(u32, temp,	gpmc_t->cs_rd_off + dev_t->t_ce_rdyz);
	gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp);

	return 0;
}

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static int gpmc_calc_sync_write_timings(struct gpmc_timings *gpmc_t,
					struct gpmc_device_timings *dev_t,
					bool mux)
{
	u32 temp;

	/* adv_wr_off */
	temp = dev_t->t_avdp_w;
	if (mux) {
		temp = max_t(u32, temp,
			gpmc_t->clk_activation + dev_t->t_avdh);
		temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
	}
	gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp);

	/* wr_data_mux_bus */
	temp = max_t(u32, dev_t->t_weasu,
			gpmc_t->clk_activation + dev_t->t_rdyo);
	/* XXX: shouldn't mux be kept as a whole for wr_data_mux_bus ?,
         * and in that case remember to handle we_on properly
         */
	if (mux) {
		temp = max_t(u32, temp,
			gpmc_t->adv_wr_off + dev_t->t_aavdh);
		temp = max_t(u32, temp, gpmc_t->adv_wr_off +
				gpmc_ticks_to_ps(dev_t->cyc_aavdh_we));
	}
	gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp);

	/* we_on */
	if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
		gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu);
	else
		gpmc_t->we_on = gpmc_t->wr_data_mux_bus;

	/* wr_access */
	/* XXX: gpmc_capability check reqd ? , even if not, will not harm */
	gpmc_t->wr_access = gpmc_t->access;

	/* we_off */
	temp = gpmc_t->we_on + dev_t->t_wpl;
	temp = max_t(u32, temp,
			gpmc_t->wr_access + gpmc_ticks_to_ps(1));
	temp = max_t(u32, temp,
		gpmc_t->we_on + gpmc_ticks_to_ps(dev_t->cyc_wpl));
	gpmc_t->we_off = gpmc_round_ps_to_ticks(temp);

	gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off +
							dev_t->t_wph);

	/* wr_cycle */
	temp = gpmc_round_ps_to_sync_clk(dev_t->t_cez_w, gpmc_t->sync_clk);
	temp += gpmc_t->wr_access;
	/* XXX: barter t_ce_rdyz with t_cez_w ? */
	if (dev_t->t_ce_rdyz)
		temp = max_t(u32, temp,
				 gpmc_t->cs_wr_off + dev_t->t_ce_rdyz);
	gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp);

	return 0;
}

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static int gpmc_calc_async_read_timings(struct gpmc_timings *gpmc_t,
					struct gpmc_device_timings *dev_t,
					bool mux)
{
	u32 temp;

	/* adv_rd_off */
	temp = dev_t->t_avdp_r;
	if (mux)
		temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
	gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp);

	/* oe_on */
	temp = dev_t->t_oeasu;
	if (mux)
		temp = max_t(u32, temp,
			gpmc_t->adv_rd_off + dev_t->t_aavdh);
	gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp);

	/* access */
	temp = max_t(u32, dev_t->t_iaa, /* XXX: remove t_iaa in async ? */
				gpmc_t->oe_on + dev_t->t_oe);
	temp = max_t(u32, temp,
				gpmc_t->cs_on + dev_t->t_ce);
	temp = max_t(u32, temp,
				gpmc_t->adv_on + dev_t->t_aa);
	gpmc_t->access = gpmc_round_ps_to_ticks(temp);

	gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1);
	gpmc_t->cs_rd_off = gpmc_t->oe_off;

	/* rd_cycle */
	temp = max_t(u32, dev_t->t_rd_cycle,
			gpmc_t->cs_rd_off + dev_t->t_cez_r);
	temp = max_t(u32, temp, gpmc_t->oe_off + dev_t->t_oez);
	gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp);

	return 0;
}

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static int gpmc_calc_async_write_timings(struct gpmc_timings *gpmc_t,
					 struct gpmc_device_timings *dev_t,
					 bool mux)
{
	u32 temp;

	/* adv_wr_off */
	temp = dev_t->t_avdp_w;
	if (mux)
		temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
	gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp);

	/* wr_data_mux_bus */
	temp = dev_t->t_weasu;
	if (mux) {
		temp = max_t(u32, temp,	gpmc_t->adv_wr_off + dev_t->t_aavdh);
		temp = max_t(u32, temp, gpmc_t->adv_wr_off +
				gpmc_ticks_to_ps(dev_t->cyc_aavdh_we));
	}
	gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp);

	/* we_on */
	if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
		gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu);
	else
		gpmc_t->we_on = gpmc_t->wr_data_mux_bus;

	/* we_off */
	temp = gpmc_t->we_on + dev_t->t_wpl;
	gpmc_t->we_off = gpmc_round_ps_to_ticks(temp);

	gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off +
							dev_t->t_wph);

	/* wr_cycle */
	temp = max_t(u32, dev_t->t_wr_cycle,
				gpmc_t->cs_wr_off + dev_t->t_cez_w);
	gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp);

	return 0;
}

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static int gpmc_calc_sync_common_timings(struct gpmc_timings *gpmc_t,
			struct gpmc_device_timings *dev_t)
{
	u32 temp;

	gpmc_t->sync_clk = gpmc_calc_divider(dev_t->clk) *
						gpmc_get_fclk_period();

	gpmc_t->page_burst_access = gpmc_round_ps_to_sync_clk(
					dev_t->t_bacc,
					gpmc_t->sync_clk);

	temp = max_t(u32, dev_t->t_ces, dev_t->t_avds);
	gpmc_t->clk_activation = gpmc_round_ps_to_ticks(temp);

	if (gpmc_calc_divider(gpmc_t->sync_clk) != 1)
		return 0;

	if (dev_t->ce_xdelay)
		gpmc_t->bool_timings.cs_extra_delay = true;
	if (dev_t->avd_xdelay)
		gpmc_t->bool_timings.adv_extra_delay = true;
	if (dev_t->oe_xdelay)
		gpmc_t->bool_timings.oe_extra_delay = true;
	if (dev_t->we_xdelay)
		gpmc_t->bool_timings.we_extra_delay = true;

	return 0;
}

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static int gpmc_calc_common_timings(struct gpmc_timings *gpmc_t,
				    struct gpmc_device_timings *dev_t,
				    bool sync)
{
	u32 temp;

	/* cs_on */
	gpmc_t->cs_on = gpmc_round_ps_to_ticks(dev_t->t_ceasu);

	/* adv_on */
	temp = dev_t->t_avdasu;
	if (dev_t->t_ce_avd)
		temp = max_t(u32, temp,
				gpmc_t->cs_on + dev_t->t_ce_avd);
	gpmc_t->adv_on = gpmc_round_ps_to_ticks(temp);

	if (sync)
		gpmc_calc_sync_common_timings(gpmc_t, dev_t);

	return 0;
}

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/* TODO: remove this function once all peripherals are confirmed to
 * work with generic timing. Simultaneously gpmc_cs_set_timings()
 * has to be modified to handle timings in ps instead of ns
*/


static void gpmc_convert_ps_to_ns(struct gpmc_timings *t)
{
	t->cs_on /= 1000;
	t->cs_rd_off /= 1000;
	t->cs_wr_off /= 1000;
	t->adv_on /= 1000;
	t->adv_rd_off /= 1000;
	t->adv_wr_off /= 1000;
	t->we_on /= 1000;
	t->we_off /= 1000;
	t->oe_on /= 1000;
	t->oe_off /= 1000;
	t->page_burst_access /= 1000;
	t->access /= 1000;
	t->rd_cycle /= 1000;
	t->wr_cycle /= 1000;
	t->bus_turnaround /= 1000;
	t->cycle2cycle_delay /= 1000;
	t->wait_monitoring /= 1000;
	t->clk_activation /= 1000;
	t->wr_access /= 1000;
	t->wr_data_mux_bus /= 1000;
}

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int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
		      struct gpmc_settings *gpmc_s,
		      struct gpmc_device_timings *dev_t)
{
	bool mux = false, sync = false;

	if (gpmc_s) {
		mux = gpmc_s->mux_add_data ? true : false;
		sync = (gpmc_s->sync_read || gpmc_s->sync_write);
	}

	memset(gpmc_t, 0, sizeof(*gpmc_t));

	gpmc_calc_common_timings(gpmc_t, dev_t, sync);

	if (gpmc_s && gpmc_s->sync_read)
		gpmc_calc_sync_read_timings(gpmc_t, dev_t, mux);
	else
		gpmc_calc_async_read_timings(gpmc_t, dev_t, mux);

	if (gpmc_s && gpmc_s->sync_write)
		gpmc_calc_sync_write_timings(gpmc_t, dev_t, mux);
	else
		gpmc_calc_async_write_timings(gpmc_t, dev_t, mux);

	/* TODO: remove, see function definition */
	gpmc_convert_ps_to_ns(gpmc_t);

	return 0;
}

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/**
 * gpmc_cs_program_settings - programs non-timing related settings
 * @cs:         GPMC chip-select to program
 * @p:          pointer to GPMC settings structure
 *
 * Programs non-timing related settings for a GPMC chip-select, such as
 * bus-width, burst configuration, etc. Function should be called once
 * for each chip-select that is being used and must be called before
 * calling gpmc_cs_set_timings() as timing parameters in the CONFIG1
 * register will be initialised to zero by this function. Returns 0 on
 * success and appropriate negative error code on failure.
 */


int gpmc_cs_program_settings(int cs, struct gpmc_settings *p)
{
	u32 config1;

	if ((!p->device_width) || (p->device_width > GPMC_DEVWIDTH_16BIT)) {
		pr_err("%s: invalid width %d!", __func__, p->device_width);
		return -EINVAL;
	}

	/* Address-data multiplexing not supported for NAND devices */
	if (p->device_nand && p->mux_add_data) {
		pr_err("%s: invalid configuration!\n", __func__);
		return -EINVAL;
	}

	if ((p->mux_add_data > GPMC_MUX_AD) ||
	    ((p->mux_add_data == GPMC_MUX_AAD) &&
	     !(gpmc_capability & GPMC_HAS_MUX_AAD))) {
		pr_err("%s: invalid multiplex configuration!\n", __func__);
		return -EINVAL;
	}

	/* Page/burst mode supports lengths of 4, 8 and 16 bytes */
	if (p->burst_read || p->burst_write) {
		switch (p->burst_len) {
		case GPMC_BURST_4:
		case GPMC_BURST_8:
		case GPMC_BURST_16:
			break;
		default:
			pr_err("%s: invalid page/burst-length (%d)\n",
			       __func__, p->burst_len);
			return -EINVAL;
		}
	}

	if (p->wait_pin > gpmc_nr_waitpins) {
		pr_err("%s: invalid wait-pin (%d)\n", __func__, p->wait_pin);
		return -EINVAL;
	}

	config1 = GPMC_CONFIG1_DEVICESIZE((p->device_width - 1));

	if (p->sync_read)
		config1 |= GPMC_CONFIG1_READTYPE_SYNC;
	if (p->sync_write)
		config1 |= GPMC_CONFIG1_WRITETYPE_SYNC;
	if (p->wait_on_read)
		config1 |= GPMC_CONFIG1_WAIT_READ_MON;
	if (p->wait_on_write)
		config1 |= GPMC_CONFIG1_WAIT_WRITE_MON;
	if (p->wait_on_read || p->wait_on_write)
		config1 |= GPMC_CONFIG1_WAIT_PIN_SEL(p->wait_pin);
	if (p->device_nand)
		config1	|= GPMC_CONFIG1_DEVICETYPE(GPMC_DEVICETYPE_NAND);
	if (p->mux_add_data)
		config1	|= GPMC_CONFIG1_MUXTYPE(p->mux_add_data);
	if (p->burst_read)
		config1 |= GPMC_CONFIG1_READMULTIPLE_SUPP;
	if (p->burst_write)
		config1 |= GPMC_CONFIG1_WRITEMULTIPLE_SUPP;
	if (p->burst_read || p->burst_write) {
		config1 |= GPMC_CONFIG1_PAGE_LEN(p->burst_len >> 3);
		config1 |= p->burst_wrap ? GPMC_CONFIG1_WRAPBURST_SUPP : 0;
	}

	gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, config1);

	return 0;
}

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#ifdef CONFIG_OF

static const struct of_device_id gpmc_dt_ids[] = {
	{ .compatible = "ti,omap2420-gpmc" },
	{ .compatible = "ti,omap2430-gpmc" },
	{ .compatible = "ti,omap3430-gpmc" },	/* omap3430 & omap3630 */
	{ .compatible = "ti,omap4430-gpmc" },	/* omap4430 & omap4460 & omap543x */
	{ .compatible = "ti,am3352-gpmc" },	/* am335x devices */
	{ }
};

/**
 * gpmc_read_settings_dt - read gpmc settings from device-tree
 * @np:         pointer to device-tree node for a gpmc child device
 * @p:          pointer to gpmc settings structure
 *
 * Reads the GPMC settings for a GPMC child device from device-tree and
 * stores them in the GPMC settings structure passed. The GPMC settings
 * structure is initialised to zero by this function and so any
 * previously stored settings will be cleared.
 */


void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p)
{
	memset(p, 0, sizeof(struct gpmc_settings));

	p->sync_read = of_property_read_bool(np, "gpmc,sync-read");
	p->sync_write = of_property_read_bool(np, "gpmc,sync-write");
	of_property_read_u32(np, "gpmc,device-width", &p->device_width);
	of_property_read_u32(np, "gpmc,mux-add-data", &p->mux_add_data);

	if (!of_property_read_u32(np, "gpmc,burst-length", &p->burst_len)) {
		p->burst_wrap = of_property_read_bool(np, "gpmc,burst-wrap");
		p->burst_read = of_property_read_bool(np, "gpmc,burst-read");
		p->burst_write = of_property_read_bool(np, "gpmc,burst-write");
		if (!p->burst_read && !p->burst_write)
			pr_warn("%s: page/burst-length set but not used!\n",
				__func__);
	}

	if (!of_property_read_u32(np, "gpmc,wait-pin", &p->wait_pin)) {
		p->wait_on_read = of_property_read_bool(np,
							"gpmc,wait-on-read");
		p->wait_on_write = of_property_read_bool(np,
							 "gpmc,wait-on-write");
		if (!p->wait_on_read && !p->wait_on_write)
			pr_debug("%s: rd/wr wait monitoring not enabled!\n",
				 __func__);
	}
}

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static void __maybe_unused gpmc_read_timings_dt(struct device_node *np,
						struct gpmc_timings *gpmc_t)
{
	struct gpmc_bool_timings *p;

	if (!np || !gpmc_t)
		return;

	memset(gpmc_t, 0, sizeof(*gpmc_t));

	/* minimum clock period for syncronous mode */
	of_property_read_u32(np, "gpmc,sync-clk-ps", &gpmc_t->sync_clk);

	/* chip select timtings */
	of_property_read_u32(np, "gpmc,cs-on-ns", &gpmc_t->cs_on);
	of_property_read_u32(np, "gpmc,cs-rd-off-ns", &gpmc_t->cs_rd_off);
	of_property_read_u32(np, "gpmc,cs-wr-off-ns", &gpmc_t->cs_wr_off);

	/* ADV signal timings */
	of_property_read_u32(np, "gpmc,adv-on-ns", &gpmc_t->adv_on);
	of_property_read_u32(np, "gpmc,adv-rd-off-ns", &gpmc_t->adv_rd_off);
	of_property_read_u32(np, "gpmc,adv-wr-off-ns", &gpmc_t->adv_wr_off);
	of_property_read_u32(np, "gpmc,adv-aad-mux-on-ns",
			     &gpmc_t->adv_aad_mux_on);
	of_property_read_u32(np, "gpmc,adv-aad-mux-rd-off-ns",
			     &gpmc_t->adv_aad_mux_rd_off);
	of_property_read_u32(np, "gpmc,adv-aad-mux-wr-off-ns",
			     &gpmc_t->adv_aad_mux_wr_off);

	/* WE signal timings */
	of_property_read_u32(np, "gpmc,we-on-ns", &gpmc_t->we_on);
	of_property_read_u32(np, "gpmc,we-off-ns", &gpmc_t->we_off);

	/* OE signal timings */
	of_property_read_u32(np, "gpmc,oe-on-ns", &gpmc_t->oe_on);
	of_property_read_u32(np, "gpmc,oe-off-ns", &gpmc_t->oe_off);
	of_property_read_u32(np, "gpmc,oe-aad-mux-on-ns",
			     &gpmc_t->oe_aad_mux_on);
	of_property_read_u32(np, "gpmc,oe-aad-mux-off-ns",
			     &gpmc_t->oe_aad_mux_off);

	/* access and cycle timings */
	of_property_read_u32(np, "gpmc,page-burst-access-ns",
			     &gpmc_t->page_burst_access);
	of_property_read_u32(np, "gpmc,access-ns", &gpmc_t->access);
	of_property_read_u32(np, "gpmc,rd-cycle-ns", &gpmc_t->rd_cycle);
	of_property_read_u32(np, "gpmc,wr-cycle-ns", &gpmc_t->wr_cycle);
	of_property_read_u32(np, "gpmc,bus-turnaround-ns",
			     &gpmc_t->bus_turnaround);
	of_property_read_u32(np, "gpmc,cycle2cycle-delay-ns",
			     &gpmc_t->cycle2cycle_delay);
	of_property_read_u32(np, "gpmc,wait-monitoring-ns",
			     &gpmc_t->wait_monitoring);
	of_property_read_u32(np, "gpmc,clk-activation-ns",
			     &gpmc_t->clk_activation);

	/* only applicable to OMAP3+ */
	of_property_read_u32(np, "gpmc,wr-access-ns", &gpmc_t->wr_access);
	of_property_read_u32(np, "gpmc,wr-data-mux-bus-ns",
			     &gpmc_t->wr_data_mux_bus);

	/* bool timing parameters */
	p = &gpmc_t->bool_timings;

	p->cycle2cyclediffcsen =
		of_property_read_bool(np, "gpmc,cycle2cycle-diffcsen");
	p->cycle2cyclesamecsen =
		of_property_read_bool(np, "gpmc,cycle2cycle-samecsen");
	p->we_extra_delay = of_property_read_bool(np, "gpmc,we-extra-delay");
	p->oe_extra_delay = of_property_read_bool(np, "gpmc,oe-extra-delay");
	p->adv_extra_delay = of_property_read_bool(np, "gpmc,adv-extra-delay");
	p->cs_extra_delay = of_property_read_bool(np, "gpmc,cs-extra-delay");
	p->time_para_granularity =
		of_property_read_bool(np, "gpmc,time-para-granularity");
}

Contributors
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CommitProp
Jon Hunter
179
39.96%
1
16.67%
Daniel Mack
178
39.73%
1
16.67%
Neil Armstrong
60
13.39%
1
16.67%
Rajendra Nayak
19
4.24%
1
16.67%
Afzal Mohammed
12
2.68%
2
33.33%
Total
448
100.00%
6
100.00%

#if IS_ENABLED(CONFIG_MTD_ONENAND)


static int gpmc_probe_onenand_child(struct platform_device *pdev,
				 struct device_node *child)
{
	u32 val;
	struct omap_onenand_platform_data *gpmc_onenand_data;

	if (of_property_read_u32(child, "reg", &val) < 0) {
		dev_err(&pdev->dev, "%pOF has no 'reg' property\n",
			child);
		return -ENODEV;
	}

	gpmc_onenand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_onenand_data),
					 GFP_KERNEL);
	if (!gpmc_onenand_data)
		return -ENOMEM;

	gpmc_onenand_data->cs = val;
	gpmc_onenand_data->of_node = child;
	gpmc_onenand_data->dma_channel = -1;

	if (!of_property_read_u32(child, "dma-channel", &val))
		gpmc_onenand_data->dma_channel = val;

	return gpmc_onenand_init(gpmc_onenand_data);
}
Contributors
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Daniel Mack
85
66.93%
1
20.00%
Roger Quadros
28
22.05%
1
20.00%
Gupta Pekon
12
9.45%
1
20.00%
Ladislav Michl
1
0.79%
1
20.00%
Rob Herring
1
0.79%
1
20.00%
Total
127
100.00%
5
100.00%

#else


static int gpmc_probe_onenand_child(struct platform_device *pdev,
				    struct device_node *child)
{
	return 0;
}
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100.00%

#endif

/**
 * gpmc_probe_generic_child - configures the gpmc for a child device
 * @pdev:       pointer to gpmc platform device
 * @child:      pointer to device-tree node for child device
 *
 * Allocates and configures a GPMC chip-select for a child device.
 * Returns 0 on success and appropriate negative error code on failure.
 */


static int gpmc_probe_generic_child(struct platform_device *pdev,
				struct device_node *child)
{
	struct gpmc_settings gpmc_s;
	struct gpmc_timings gpmc_t;
	struct resource res;
	unsigned long base;
	const char *name;
	int ret, cs;
	u32 val;
	struct gpio_desc *waitpin_desc = NULL;
	struct gpmc_device *gpmc = platform_get_drvdata(pdev);

	if (of_property_read_u32(child, "reg", &cs) < 0) {
		dev_err(&pdev->dev, "%pOF has no 'reg' property\n",
			child);
		return -ENODEV;
	}

	if (of_address_to_resource(child, 0, &res) < 0) {
		dev_err(&pdev->dev, "%pOF has malformed 'reg' property\n",
			child);
		return -ENODEV;
	}

	/*
         * Check if we have multiple instances of the same device
         * on a single chip select. If so, use the already initialized
         * timings.
         */
	name = gpmc_cs_get_name(cs);
	if (name && child->name && of_node_cmp(child->name, name) == 0)
			goto no_timings;

	ret = gpmc_cs_request(cs, resource_size(&res), &base);
	if (ret < 0) {
		dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs);
		return ret;
	}
	gpmc_cs_set_name(cs, child->name);

	gpmc_read_settings_dt(child, &gpmc_s);
	gpmc_read_timings_dt(child, &gpmc_t);

	/*
         * For some GPMC devices we still need to rely on the bootloader
         * timings because the devices can be connected via FPGA.
         * REVISIT: Add timing support from slls644g.pdf.
         */
	if (!gpmc_t.cs_rd_off) {
		WARN(1, "enable GPMC debug to configure .dts timings for CS%i\n",
			cs);
		gpmc_cs_show_timings(cs,
				     "please add GPMC bootloader timings to .dts");
		goto no_timings;
	}

	/* CS must be disabled while making changes to gpmc configuration */
	gpmc_cs_disable_mem(cs);

	/*
         * FIXME: gpmc_cs_request() will map the CS to an arbitary
         * location in the gpmc address space. When booting with
         * device-tree we want the NOR flash to be mapped to the
         * location specified in the device-tree blob. So remap the
         * CS to this location. Once DT migration is complete should
         * just make gpmc_cs_request() map a specific address.
         */
	ret = gpmc_cs_remap(cs, res.start);
	if (ret < 0) {
		dev_err(&pdev->dev, "cannot remap GPMC CS %d to %pa\n",
			cs, &res.start);
		if (res.start < GPMC_MEM_START) {
			dev_info(&pdev->dev,
				 "GPMC CS %d start cannot be lesser than 0x%x\n",
				 cs, GPMC_MEM_START);
		} else if (res.end > GPMC_MEM_END) {
			dev_info(&pdev->dev,
				 "GPMC CS %d end cannot be greater than 0x%x\n",
				 cs, GPMC_MEM_END);
		}
		goto err;
	}

	if (of_node_cmp(child->name, "nand") == 0) {
		/* Warn about older DT blobs with no compatible property */
		if (!of_property_read_bool(child, "compatible")) {
			dev_warn(&pdev->dev,
				 "Incompatible NAND node: missing compatible");
			ret = -EINVAL;
			goto err;
		}
	}

	if (of_device_is_compatible(child, "ti,omap2-nand")) {
		/* NAND specific setup */
		val = 8;
		of_property_read_u32(child, "nand-bus-width", &val);
		switch (val) {
		case 8:
			gpmc_s.device_width = GPMC_DEVWIDTH_8BIT;
			break;
		case 16:
			gpmc_s.device_width = GPMC_DEVWIDTH_16BIT;
			break;
		default:
			dev_err(&pdev->dev, "%s: invalid 'nand-bus-width'\n",
				child->name);
			ret = -EINVAL;
			goto err;
		}

		/* disable write protect */
		gpmc_configure(GPMC_CONFIG_WP, 0);
		gpmc_s.device_nand = true;
	} else {
		ret = of_property_read_u32(child, "bank-width",
					   &gpmc_s.device_width);
		if (ret < 0) {
			dev_err(&pdev->dev, "%pOF has no 'bank-width' property\n",
				child);
			goto err;
		}
	}

	/* Reserve wait pin if it is required and valid */
	if (gpmc_s.wait_on_read || gpmc_s.wait_on_write) {
		unsigned int wait_pin = gpmc_s.wait_pin;

		waitpin_desc = gpiochip_request_own_desc(&gpmc->gpio_chip,
							 wait_pin, "WAITPIN");
		if (IS_ERR(waitpin_desc)) {
			dev_err(&pdev->dev, "invalid wait-pin: %d\n", wait_pin);
			ret = PTR_ERR(waitpin_desc);
			goto err;
		}
	}

	gpmc_cs_show_timings(cs, "before gpmc_cs_program_settings");

	ret = gpmc_cs_program_settings(cs, &gpmc_s);
	if (ret < 0)
		goto err_cs;

	ret = gpmc_cs_set_timings(cs, &gpmc_t, &gpmc_s);
	if (ret) {
		dev_err(&pdev->dev, "failed to set gpmc timings for: %s\n",
			child->name);
		goto err_cs;
	}

	/* Clear limited address i.e. enable A26-A11 */
	val = gpmc_read_reg(GPMC_CONFIG);
	val &= ~GPMC_CONFIG_LIMITEDADDRESS;
	gpmc_write_reg(GPMC_CONFIG, val);

	/* Enable CS region */
	gpmc_cs_enable_mem(cs);

no_timings:

	/* create platform device, NULL on error or when disabled */
	if (!of_platform_device_create(child, NULL, &pdev->dev))
		goto err_child_fail;

	/* is child a common bus? */
	if (of_match_node(of_default_bus_match_table, child))
		/* create children and other common bus children */
		if (of_platform_default_populate(child, NULL, &pdev->dev))
			goto err_child_fail;

	return 0;

err_child_fail:

	dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name);
	ret = -ENODEV;

err_cs:
	gpiochip_free_own_desc(waitpin_desc);
err:
	gpmc_cs_free(cs);

	return ret;
}

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406
53.21%
7
31.82%
Jon Hunter
172
22.54%
1
4.55%
Tony Lindgren
80
10.48%
3
13.64%
Robert ABEL
37
4.85%
2
9.09%
Uwe Kleine-König
20
2.62%
2
9.09%
Gupta Pekon
20
2.62%
1
4.55%
Daniel Mack
9
1.18%
1
4.55%
Boris Brezillon
8
1.05%
1
4.55%
Javier Martinez Canillas
5
0.66%
1
4.55%
Rob Herring
3
0.39%
1
4.55%
Fabio Estevam
2
0.26%
1
4.55%
Kefeng Wang
1
0.13%
1
4.55%
Total
763
100.00%
22
100.00%



static int gpmc_probe_dt(struct platform_device *pdev)
{
	int ret;
	const struct of_device_id *of_id =
		of_match_device(gpmc_dt_ids, &pdev->dev);

	if (!of_id)
		return 0;

	ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-cs",
				   &gpmc_cs_num);
	if (ret < 0) {
		pr_err("%s: number of chip-selects not defined\n", __func__);
		return ret;
	} else if (gpmc_cs_num < 1) {
		pr_err("%s: all chip-selects are disabled\n", __func__);
		return -EINVAL;
	} else if (gpmc_cs_num > GPMC_CS_NUM) {
		pr_err("%s: number of supported chip-selects cannot be > %d\n",
					 __func__, GPMC_CS_NUM);
		return -EINVAL;
	}

	ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-waitpins",
				   &gpmc_nr_waitpins);
	if (ret < 0) {
		pr_err("%s: number of wait pins not found!\n", __func__);
		return ret;
	}

	return 0;
}

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151
100.00%
2
100.00%



static void gpmc_probe_dt_children(struct platform_device *pdev)
{
	int ret;
	struct device_node *child;

	for_each_available_child_of_node(pdev->dev.of_node, child) {

		if (!child->name)
			continue;

		if (of_node_cmp(child->name, "onenand") == 0)
			ret = gpmc_probe_onenand_child(pdev, child);
		else
			ret = gpmc_probe_generic_child(pdev, child);

		if (ret) {
			dev_err(&pdev->dev, "failed to probe DT child '%s': %d\n",
				child->name, ret);
		}
	}
}
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Roger Quadros
71
79.78%
2
66.67%
Johan Hovold
18
20.22%
1
33.33%
Total
89
100.00%
3
100.00%

#else


static int gpmc_probe_dt(struct platform_device *pdev)
{
	return 0;
}

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static void gpmc_probe_dt_children(struct platform_device *pdev)
{
}
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2
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1
33.33%
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1
10.00%
1
33.33%
Total
10
100.00%
3
100.00%

#endif /* CONFIG_OF */



static int gpmc_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
{
	return 1;	/* we're input only */
}

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4
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3
15.79%
1
33.33%
Total
19
100.00%
3
100.00%



static int gpmc_gpio_direction_input(struct gpio_chip *chip,
				     unsigned int offset)
{
	return 0;	/* we're input only */
}

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2
100.00%



static int gpmc_gpio_direction_output(struct gpio_chip *chip,
				      unsigned int offset, int value)
{
	return -EINVAL;	/* we're input only */
}

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2
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static void gpmc_gpio_set(struct gpio_chip *chip, unsigned int offset,
			  int value)
{
}

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static int gpmc_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
	u32 reg;

	offset += 8;

	reg = gpmc_read_reg(GPMC_STATUS) & BIT(offset);

	return !!reg;
}

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10.26%
1
25.00%
Total
39
100.00%
4
100.00%



static int gpmc_gpio_init(struct gpmc_device *gpmc)
{
	int ret;

	gpmc->gpio_chip.parent = gpmc->dev;
	gpmc->gpio_chip.owner = THIS_MODULE;
	gpmc->gpio_chip.label = DEVICE_NAME;
	gpmc->gpio_chip.ngpio = gpmc_nr_waitpins;
	gpmc->gpio_chip.get_direction = gpmc_gpio_get_direction;
	gpmc->gpio_chip.direction_input = gpmc_gpio_direction_input;
	gpmc->gpio_chip.direction_output = gpmc_gpio_direction_output;
	gpmc->gpio_chip.set = gpmc_gpio_set;
	gpmc->gpio_chip.get = gpmc_gpio_get;
	gpmc->gpio_chip.base = -1;

	ret = devm_gpiochip_add_data(gpmc->dev, &gpmc->gpio_chip, NULL);
	if (ret < 0) {
		dev_err(gpmc->dev, "could not register gpio chip: %d\n", ret);
		return ret;
	}

	return 0;
}

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5.07%
1
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7
5.07%
1
14.29%
Tony Lindgren
5
3.62%
1
14.29%
Jon Hunter
2
1.45%
1
14.29%
Javier Martinez Canillas
2
1.45%
1
14.29%
Total
138
100.00%
7
100.00%



static int gpmc_probe(struct platform_device *pdev)
{
	int rc;
	u32 l;
	struct resource *res;
	struct gpmc_device *gpmc;

	gpmc = devm_kzalloc(&pdev->dev, sizeof(*gpmc), GFP_KERNEL);
	if (!gpmc)
		return -ENOMEM;

	gpmc->dev = &pdev->dev;
	platform_set_drvdata(pdev, gpmc);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL)
		return -ENOENT;

	phys_base = res->start;
	mem_size = resource_size(res);

	gpmc_base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(gpmc_base))
		return PTR_ERR(gpmc_base);

	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!res) {
		dev_err(&pdev->dev, "Failed to get resource: irq\n");
		return -ENOENT;
	}

	gpmc->irq = res->start;

	gpmc_l3_clk = devm_clk_get(&pdev->dev, "fck");
	if (IS_ERR(gpmc_l3_clk)) {
		dev_err(&pdev->dev, "Failed to get GPMC fck\n");
		return PTR_ERR(gpmc_l3_clk);
	}

	if (!clk_get_rate(gpmc_l3_clk)) {
		dev_err(&pdev->dev, "Invalid GPMC fck clock rate\n");
		return -EINVAL;
	}

	if (pdev->dev.of_node) {
		rc = gpmc_probe_dt(pdev);
		if (rc)
			return rc;
	} else {
		gpmc_cs_num = GPMC_CS_NUM;
		gpmc_nr_waitpins = GPMC_NR_WAITPINS;
	}

	pm_runtime_enable(&pdev->dev);
	pm_runtime_get_sync(&pdev->dev);

	l = gpmc_read_reg(GPMC_REVISION);

	/*
         * FIXME: Once device-tree migration is complete the below flags
         * should be populated based upon the device-tree compatible
         * string. For now just use the IP revision. OMAP3+ devices have
         * the wr_access and wr_data_mux_bus register fields. OMAP4+
         * devices support the addr-addr-data multiplex protocol.
         *
         * GPMC IP revisions:
         * - OMAP24xx                   = 2.0
         * - OMAP3xxx                   = 5.0
         * - OMAP44xx/54xx/AM335x       = 6.0
         */
	if (GPMC_REVISION_MAJOR(l) > 0x4)
		gpmc_capability = GPMC_HAS_WR_ACCESS | GPMC_HAS_WR_DATA_MUX_BUS;
	if (GPMC_REVISION_MAJOR(l) > 0x5)
		gpmc_capability |= GPMC_HAS_MUX_AAD;
	dev_info(gpmc->dev, "GPMC revision %d.%d\n", GPMC_REVISION_MAJOR(l),
		 GPMC_REVISION_MINOR(l));

	gpmc_mem_init();
	rc = gpmc_gpio_init(gpmc);
	if (rc)
		goto gpio_init_failed;

	gpmc->nirqs = GPMC_NR_NAND_IRQS + gpmc_nr_waitpins;
	rc = gpmc_setup_irq(gpmc);
	if (rc) {
		dev_err(gpmc->dev, "gpmc_setup_irq failed\n");
		goto gpio_init_failed;
	}

	gpmc_probe_dt_children(pdev);

	return 0;

gpio_init_failed:
	gpmc_mem_exit();
	pm_runtime_put_sync(&pdev->dev);
	pm_runtime_disable(&pdev->dev);

	return rc;
}

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27.75%
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57
13.64%
3
21.43%
Sukumar Ghorai
23
5.50%
1
7.14%
Jon Hunter
14
3.35%
1
7.14%
Philip Avinash
13
3.11%
1
7.14%
Linus Torvalds
7
1.67%
1
7.14%
Linus Walleij
1
0.24%
1
7.14%
Rajendra Nayak
1
0.24%
1
7.14%
Total
418
100.00%
14
100.00%



static int gpmc_remove(struct platform_device *pdev)
{
	struct gpmc_device *gpmc = platform_get_drvdata(pdev);

	gpmc_free_irq(gpmc);
	gpmc_mem_exit();
	pm_runtime_put_sync(&pdev->dev);
	pm_runtime_disable(&pdev->dev);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Philip Avinash
16
33.33%
1
20.00%
Roger Quadros
13
27.08%
1
20.00%
Afzal Mohammed
12
25.00%
2
40.00%
Sukumar Ghorai
7
14.58%
1
20.00%
Total
48
100.00%
5
100.00%

#ifdef CONFIG_PM_SLEEP


static int gpmc_suspend(struct device *dev)
{
	omap3_gpmc_save_context();
	pm_runtime_put_sync(dev);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Philip Avinash
22
100.00%
1
100.00%
Total
22
100.00%
1
100.00%



static int gpmc_resume(struct device *dev)
{
	pm_runtime_get_sync(dev);
	omap3_gpmc_restore_context();
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Philip Avinash
22
100.00%
1
100.00%
Total
22
100.00%
1
100.00%

#endif

static SIMPLE_DEV_PM_OPS(gpmc_pm_ops, gpmc_suspend, gpmc_resume);


static struct platform_driver gpmc_driver = {
	.probe		= gpmc_probe,
	.remove		= gpmc_remove,
	.driver		= {
		.name	= DEVICE_NAME,
		.of_match_table = of_match_ptr(gpmc_dt_ids),
		.pm	= &gpmc_pm_ops,
        },
};



static __init int gpmc_init(void)
{
	return platform_driver_register(&gpmc_driver);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Afzal Mohammed
15
93.75%
2
66.67%
Sukumar Ghorai
1
6.25%
1
33.33%
Total
16
100.00%
3
100.00%


postcore_initcall(gpmc_init);


static struct omap3_gpmc_regs gpmc_context;



void omap3_gpmc_save_context(void)
{
	int i;

	if (!gpmc_base)
		return;

	gpmc_context.sysconfig = gpmc_read_reg(GPMC_SYSCONFIG);
	gpmc_context.irqenable = gpmc_read_reg(GPMC_IRQENABLE);
	gpmc_context.timeout_ctrl = gpmc_read_reg(GPMC_TIMEOUT_CONTROL);
	gpmc_context.config = gpmc_read_reg(GPMC_CONFIG);
	gpmc_context.prefetch_config1 = gpmc_read_reg(GPMC_PREFETCH_CONFIG1);
	gpmc_context.prefetch_config2 = gpmc_read_reg(GPMC_PREFETCH_CONFIG2);
	gpmc_context.prefetch_control = gpmc_read_reg(GPMC_PREFETCH_CONTROL);
	for (i = 0; i < gpmc_cs_num; i++) {
		gpmc_context.cs_context[i].is_valid = gpmc_cs_mem_enabled(i);
		if (gpmc_context.cs_context[i].is_valid) {
			gpmc_context.cs_context[i].config1 =
				gpmc_cs_read_reg(i, GPMC_CS_CONFIG1);
			gpmc_context.cs_context[i].config2 =
				gpmc_cs_read_reg(i, GPMC_CS_CONFIG2);
			gpmc_context.cs_context[i].config3 =
				gpmc_cs_read_reg(i, GPMC_CS_CONFIG3);
			gpmc_context.cs_context[i].config4 =
				gpmc_cs_read_reg(i, GPMC_CS_CONFIG4);
			gpmc_context.cs_context[i].config5 =
				gpmc_cs_read_reg(i, GPMC_CS_CONFIG5);
			gpmc_context.cs_context[i].config6 =
				gpmc_cs_read_reg(i, GPMC_CS_CONFIG6);
			gpmc_context.cs_context[i].config7 =
				gpmc_cs_read_reg(i, GPMC_CS_CONFIG7);
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Afzal Mohammed
173
74.25%
4
44.44%
Ivan Djelic
46
19.74%
1
11.11%
Sukumar Ghorai
6
2.58%
1
11.11%
Tomeu Vizoso
6
2.58%
1
11.11%
Juha Yrjölä
1
0.43%
1
11.11%
Gupta Pekon
1
0.43%
1
11.11%
Total
233
100.00%
9
100.00%



void omap3_gpmc_restore_context(void)
{
	int i;

	if (!gpmc_base)
		return;

	gpmc_write_reg(GPMC_SYSCONFIG, gpmc_context.sysconfig);
	gpmc_write_reg(GPMC_IRQENABLE, gpmc_context.irqenable);
	gpmc_write_reg(GPMC_TIMEOUT_CONTROL, gpmc_context.timeout_ctrl);
	gpmc_write_reg(GPMC_CONFIG, gpmc_context.config);
	gpmc_write_reg(GPMC_PREFETCH_CONFIG1, gpmc_context.prefetch_config1);
	gpmc_write_reg(GPMC_PREFETCH_CONFIG2, gpmc_context.prefetch_config2);
	gpmc_write_reg(GPMC_PREFETCH_CONTROL, gpmc_context.prefetch_control);
	for (i = 0; i < gpmc_cs_num; i++) {
		if (gpmc_context.cs_context[i].is_valid) {
			gpmc_cs_write_reg(i, GPMC_CS_CONFIG1,
				gpmc_context.cs_context[i].config1);
			gpmc_cs_write_reg(i, GPMC_CS_CONFIG2,
				gpmc_context.cs_context[i].config2);
			gpmc_cs_write_reg(i, GPMC_CS_CONFIG3,
				gpmc_context.cs_context[i].config3);
			gpmc_cs_write_reg(i, GPMC_CS_CONFIG4,
				gpmc_context.cs_context[i].config4);
			gpmc_cs_write_reg(i, GPMC_CS_CONFIG5,
				gpmc_context.cs_context[i].config5);
			gpmc_cs_write_reg(i, GPMC_CS_CONFIG6,
				gpmc_context.cs_context[i].config6);
			gpmc_cs_write_reg(i, GPMC_CS_CONFIG7,
				gpmc_context.cs_context[i].config7);
		}
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Rajendra Nayak
138
63.01%
1
16.67%
Afzal Mohammed
42
19.18%
1
16.67%
Ivan Djelic
31
14.16%
1
16.67%
Tomeu Vizoso
6
2.74%
1
16.67%
Felipe Balbi
1
0.46%
1
16.67%
Gupta Pekon
1
0.46%
1
16.67%
Total
219
100.00%
6
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Afzal Mohammed
2747
25.64%
9
7.96%
Roger Quadros
1906
17.79%
17
15.04%
Jon Hunter
1181
11.02%
11
9.73%
Tony Lindgren
1125
10.50%
12
10.62%
Juha Yrjölä
707
6.60%
2
1.77%
Imre Deak
598
5.58%
1
0.88%
Robert ABEL
588
5.49%
7
6.19%
Daniel Mack
470
4.39%
1
0.88%
Rajendra Nayak
293
2.73%
1
0.88%
Neil Armstrong
202
1.89%
1
0.88%
Sukumar Ghorai
164
1.53%
3
2.65%
Gupta Pekon
147
1.37%
4
3.54%
Philip Avinash
94
0.88%
2
1.77%
Ivan Djelic
82
0.77%
1
0.88%
Paul Walmsley
74
0.69%
2
1.77%
Yegor Yefremov
45
0.42%
1
0.88%
Sam Protsenko
38
0.35%
2
1.77%
Adrian Hunter
36
0.34%
1
0.88%
David Brownell
33
0.31%
1
0.88%
Syed Mohammed Khasim
25
0.23%
1
0.88%
Vimal Singh
23
0.21%
1
0.88%
Uwe Kleine-König
23
0.21%
4
3.54%
Johan Hovold
20
0.19%
1
0.88%
Tomeu Vizoso
12
0.11%
1
0.88%
Ezequiel García
11
0.10%
4
3.54%
Boris Brezillon
8
0.07%
1
0.88%
Linus Walleij
8
0.07%
1
0.88%
Javier Martinez Canillas
7
0.07%
2
1.77%
Linus Torvalds
7
0.07%
1
0.88%
Felipe Balbi
6
0.06%
1
0.88%
Rob Herring
5
0.05%
2
1.77%
Thomas Gleixner
4
0.04%
1
0.88%
Roel Kluin
4
0.04%
1
0.88%
Victor Kamensky
4
0.04%
1
0.88%
Tobias Klauser
3
0.03%
1
0.88%
Bernhard Walle
3
0.03%
1
0.88%
Baoyou Xie
2
0.02%
1
0.88%
Fabio Estevam
2
0.02%
1
0.88%
Santosh Shilimkar
1
0.01%
1
0.88%
Russell King
1
0.01%
1
0.88%
Thara Gopinath
1
0.01%
1
0.88%
Ladislav Michl
1
0.01%
1
0.88%
Ocquidant, Sebastien
1
0.01%
1
0.88%
Olof Johansson
1
0.01%
1
0.88%
Kefeng Wang
1
0.01%
1
0.88%
Total
10714
100.00%
113
100.00%
Directory: drivers/memory

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