| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Dmitry Eremin-Solenikov | 615 | 33.23% | 4 | 11.76% |
| Arnd Bergmann | 502 | 27.12% | 4 | 11.76% |
| Liam Girdwood | 230 | 12.43% | 1 | 2.94% |
| Takashi Iwai | 143 | 7.73% | 3 | 8.82% |
| Mark Brown | 128 | 6.92% | 3 | 8.82% |
| Robert Jarzmik | 108 | 5.83% | 4 | 11.76% |
| Peng Fan | 33 | 1.78% | 1 | 2.94% |
| Nico Pitre | 27 | 1.46% | 1 | 2.94% |
| Luotao Fu | 24 | 1.30% | 1 | 2.94% |
| Mike Dunn | 14 | 0.76% | 3 | 8.82% |
| Yang Yingliang | 8 | 0.43% | 1 | 2.94% |
| Eric Miao | 7 | 0.38% | 1 | 2.94% |
| Harvey Harrison | 3 | 0.16% | 1 | 2.94% |
| Rob Herring | 2 | 0.11% | 1 | 2.94% |
| Thomas Gleixner | 2 | 0.11% | 1 | 2.94% |
| Paul Gortmaker | 2 | 0.11% | 1 | 2.94% |
| Russell King | 2 | 0.11% | 2 | 5.88% |
| Yong Zhang | 1 | 0.05% | 1 | 2.94% |
| Total | 1851 | 34 |
// SPDX-License-Identifier: GPL-2.0-only /* * Based on sound/arm/pxa2xx-ac97.c and sound/soc/pxa/pxa2xx-ac97.c * which contain: * * Author: Nicolas Pitre * Created: Dec 02, 2004 * Copyright: MontaVista Software Inc. */ #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/interrupt.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/module.h> #include <linux/io.h> #include <linux/soc/pxa/cpu.h> #include <sound/pxa2xx-lib.h> #include <linux/platform_data/asoc-pxa.h> #include "pxa2xx-ac97-regs.h" static DEFINE_MUTEX(car_mutex); static DECLARE_WAIT_QUEUE_HEAD(gsr_wq); static volatile long gsr_bits; static struct clk *ac97_clk; static struct clk *ac97conf_clk; static int reset_gpio; struct gpio_desc *rst_gpio; static void __iomem *ac97_reg_base; /* * Beware PXA27x bugs: * * o Slot 12 read from modem space will hang controller. * o CDONE, SDONE interrupt fails after any slot 12 IO. * * We therefore have an hybrid approach for waiting on SDONE (interrupt or * 1 jiffy timeout if interrupt never comes). */ int pxa2xx_ac97_read(int slot, unsigned short reg) { int val = -ENODEV; u32 __iomem *reg_addr; if (slot > 0) return -ENODEV; guard(mutex)(&car_mutex); /* set up primary or secondary codec space */ if (cpu_is_pxa25x() && reg == AC97_GPIO_STATUS) reg_addr = ac97_reg_base + (slot ? SMC_REG_BASE : PMC_REG_BASE); else reg_addr = ac97_reg_base + (slot ? SAC_REG_BASE : PAC_REG_BASE); reg_addr += (reg >> 1); /* start read access across the ac97 link */ writel(GSR_CDONE | GSR_SDONE, ac97_reg_base + GSR); gsr_bits = 0; val = (readl(reg_addr) & 0xffff); if (reg == AC97_GPIO_STATUS) return val; if (wait_event_timeout(gsr_wq, (readl(ac97_reg_base + GSR) | gsr_bits) & GSR_SDONE, 1) <= 0 && !((readl(ac97_reg_base + GSR) | gsr_bits) & GSR_SDONE)) { printk(KERN_ERR "%s: read error (ac97_reg=%d GSR=%#lx)\n", __func__, reg, readl(ac97_reg_base + GSR) | gsr_bits); return -ETIMEDOUT; } /* valid data now */ writel(GSR_CDONE | GSR_SDONE, ac97_reg_base + GSR); gsr_bits = 0; val = (readl(reg_addr) & 0xffff); /* but we've just started another cycle... */ wait_event_timeout(gsr_wq, (readl(ac97_reg_base + GSR) | gsr_bits) & GSR_SDONE, 1); return val; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_read); int pxa2xx_ac97_write(int slot, unsigned short reg, unsigned short val) { u32 __iomem *reg_addr; int ret = 0; guard(mutex)(&car_mutex); /* set up primary or secondary codec space */ if (cpu_is_pxa25x() && reg == AC97_GPIO_STATUS) reg_addr = ac97_reg_base + (slot ? SMC_REG_BASE : PMC_REG_BASE); else reg_addr = ac97_reg_base + (slot ? SAC_REG_BASE : PAC_REG_BASE); reg_addr += (reg >> 1); writel(GSR_CDONE | GSR_SDONE, ac97_reg_base + GSR); gsr_bits = 0; writel(val, reg_addr); if (wait_event_timeout(gsr_wq, (readl(ac97_reg_base + GSR) | gsr_bits) & GSR_CDONE, 1) <= 0 && !((readl(ac97_reg_base + GSR) | gsr_bits) & GSR_CDONE)) { printk(KERN_ERR "%s: write error (ac97_reg=%d GSR=%#lx)\n", __func__, reg, readl(ac97_reg_base + GSR) | gsr_bits); ret = -EIO; } return ret; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_write); #ifdef CONFIG_PXA25x static inline void pxa_ac97_warm_pxa25x(void) { gsr_bits = 0; writel(readl(ac97_reg_base + GCR) | (GCR_WARM_RST), ac97_reg_base + GCR); } static inline void pxa_ac97_cold_pxa25x(void) { writel(readl(ac97_reg_base + GCR) & ( GCR_COLD_RST), ac97_reg_base + GCR); /* clear everything but nCRST */ writel(readl(ac97_reg_base + GCR) & (~GCR_COLD_RST), ac97_reg_base + GCR); /* then assert nCRST */ gsr_bits = 0; writel(GCR_COLD_RST, ac97_reg_base + GCR); } #endif #ifdef CONFIG_PXA27x static inline void pxa_ac97_warm_pxa27x(void) { gsr_bits = 0; /* warm reset broken on Bulverde, so manually keep AC97 reset high */ pxa27x_configure_ac97reset(reset_gpio, true); udelay(10); writel(readl(ac97_reg_base + GCR) | (GCR_WARM_RST), ac97_reg_base + GCR); pxa27x_configure_ac97reset(reset_gpio, false); udelay(500); } static inline void pxa_ac97_cold_pxa27x(void) { writel(readl(ac97_reg_base + GCR) & ( GCR_COLD_RST), ac97_reg_base + GCR); /* clear everything but nCRST */ writel(readl(ac97_reg_base + GCR) & (~GCR_COLD_RST), ac97_reg_base + GCR); /* then assert nCRST */ gsr_bits = 0; /* PXA27x Developers Manual section 13.5.2.2.1 */ clk_prepare_enable(ac97conf_clk); udelay(5); clk_disable_unprepare(ac97conf_clk); writel(GCR_COLD_RST | GCR_WARM_RST, ac97_reg_base + GCR); } #endif #ifdef CONFIG_PXA3xx static inline void pxa_ac97_warm_pxa3xx(void) { gsr_bits = 0; /* Can't use interrupts */ writel(readl(ac97_reg_base + GCR) | (GCR_WARM_RST), ac97_reg_base + GCR); } static inline void pxa_ac97_cold_pxa3xx(void) { /* Hold CLKBPB for 100us */ writel(0, ac97_reg_base + GCR); writel(GCR_CLKBPB, ac97_reg_base + GCR); udelay(100); writel(0, ac97_reg_base + GCR); writel(readl(ac97_reg_base + GCR) & ( GCR_COLD_RST), ac97_reg_base + GCR); /* clear everything but nCRST */ writel(readl(ac97_reg_base + GCR) & (~GCR_COLD_RST), ac97_reg_base + GCR); /* then assert nCRST */ gsr_bits = 0; /* Can't use interrupts on PXA3xx */ writel(readl(ac97_reg_base + GCR) & (~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN)), ac97_reg_base + GCR); writel(GCR_WARM_RST | GCR_COLD_RST, ac97_reg_base + GCR); } #endif bool pxa2xx_ac97_try_warm_reset(void) { unsigned long gsr; unsigned int timeout = 100; #ifdef CONFIG_PXA25x if (cpu_is_pxa25x()) pxa_ac97_warm_pxa25x(); else #endif #ifdef CONFIG_PXA27x if (cpu_is_pxa27x()) pxa_ac97_warm_pxa27x(); else #endif #ifdef CONFIG_PXA3xx if (cpu_is_pxa3xx()) pxa_ac97_warm_pxa3xx(); else #endif snd_BUG(); while (!((readl(ac97_reg_base + GSR) | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--) mdelay(1); gsr = readl(ac97_reg_base + GSR) | gsr_bits; if (!(gsr & (GSR_PCR | GSR_SCR))) { printk(KERN_INFO "%s: warm reset timeout (GSR=%#lx)\n", __func__, gsr); return false; } return true; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_warm_reset); bool pxa2xx_ac97_try_cold_reset(void) { unsigned long gsr; unsigned int timeout = 1000; #ifdef CONFIG_PXA25x if (cpu_is_pxa25x()) pxa_ac97_cold_pxa25x(); else #endif #ifdef CONFIG_PXA27x if (cpu_is_pxa27x()) pxa_ac97_cold_pxa27x(); else #endif #ifdef CONFIG_PXA3xx if (cpu_is_pxa3xx()) pxa_ac97_cold_pxa3xx(); else #endif snd_BUG(); while (!((readl(ac97_reg_base + GSR) | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--) mdelay(1); gsr = readl(ac97_reg_base + GSR) | gsr_bits; if (!(gsr & (GSR_PCR | GSR_SCR))) { printk(KERN_INFO "%s: cold reset timeout (GSR=%#lx)\n", __func__, gsr); return false; } return true; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_try_cold_reset); void pxa2xx_ac97_finish_reset(void) { u32 gcr = readl(ac97_reg_base + GCR); gcr &= ~(GCR_PRIRDY_IEN|GCR_SECRDY_IEN); gcr |= GCR_SDONE_IE|GCR_CDONE_IE; writel(gcr, ac97_reg_base + GCR); } EXPORT_SYMBOL_GPL(pxa2xx_ac97_finish_reset); static irqreturn_t pxa2xx_ac97_irq(int irq, void *dev_id) { long status; status = readl(ac97_reg_base + GSR); if (status) { writel(status, ac97_reg_base + GSR); gsr_bits |= status; wake_up(&gsr_wq); /* Although we don't use those we still need to clear them since they tend to spuriously trigger when MMC is used (hardware bug? go figure)... */ if (cpu_is_pxa27x()) { writel(MISR_EOC, ac97_reg_base + MISR); writel(PISR_EOC, ac97_reg_base + PISR); writel(MCSR_EOC, ac97_reg_base + MCSR); } return IRQ_HANDLED; } return IRQ_NONE; } #ifdef CONFIG_PM int pxa2xx_ac97_hw_suspend(void) { writel(readl(ac97_reg_base + GCR) | (GCR_ACLINK_OFF), ac97_reg_base + GCR); clk_disable_unprepare(ac97_clk); return 0; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_suspend); int pxa2xx_ac97_hw_resume(void) { clk_prepare_enable(ac97_clk); return 0; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_resume); #endif int pxa2xx_ac97_hw_probe(struct platform_device *dev) { int ret; int irq; ac97_reg_base = devm_platform_ioremap_resource(dev, 0); if (IS_ERR(ac97_reg_base)) { dev_err(&dev->dev, "Missing MMIO resource\n"); return PTR_ERR(ac97_reg_base); } if (dev->dev.of_node) { /* Assert reset using GPIOD_OUT_HIGH, because reset is GPIO_ACTIVE_LOW */ rst_gpio = devm_gpiod_get(&dev->dev, "reset", GPIOD_OUT_HIGH); ret = PTR_ERR(rst_gpio); if (ret == -ENOENT) reset_gpio = -1; else if (ret) return ret; reset_gpio = desc_to_gpio(rst_gpio); } else { if (cpu_is_pxa27x()) reset_gpio = 113; } if (cpu_is_pxa27x()) { /* * This gpio is needed for a work-around to a bug in the ac97 * controller during warm reset. The direction and level is set * here so that it is an output driven high when switching from * AC97_nRESET alt function to generic gpio. */ gpiod_set_consumer_name(rst_gpio, "pxa27x ac97 reset"); pxa27x_configure_ac97reset(reset_gpio, false); ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK"); if (IS_ERR(ac97conf_clk)) { ret = PTR_ERR(ac97conf_clk); ac97conf_clk = NULL; goto err_conf; } } ac97_clk = clk_get(&dev->dev, "AC97CLK"); if (IS_ERR(ac97_clk)) { ret = PTR_ERR(ac97_clk); ac97_clk = NULL; goto err_clk; } ret = clk_prepare_enable(ac97_clk); if (ret) goto err_clk2; irq = platform_get_irq(dev, 0); if (irq < 0) { ret = irq; goto err_irq; } ret = request_irq(irq, pxa2xx_ac97_irq, 0, "AC97", NULL); if (ret < 0) goto err_irq; return 0; err_irq: writel(readl(ac97_reg_base + GCR) | (GCR_ACLINK_OFF), ac97_reg_base + GCR); err_clk2: clk_put(ac97_clk); ac97_clk = NULL; err_clk: if (ac97conf_clk) { clk_put(ac97conf_clk); ac97conf_clk = NULL; } err_conf: return ret; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_probe); void pxa2xx_ac97_hw_remove(struct platform_device *dev) { writel(readl(ac97_reg_base + GCR) | (GCR_ACLINK_OFF), ac97_reg_base + GCR); free_irq(platform_get_irq(dev, 0), NULL); if (ac97conf_clk) { clk_put(ac97conf_clk); ac97conf_clk = NULL; } clk_disable_unprepare(ac97_clk); clk_put(ac97_clk); ac97_clk = NULL; } EXPORT_SYMBOL_GPL(pxa2xx_ac97_hw_remove); u32 pxa2xx_ac97_read_modr(void) { if (!ac97_reg_base) return 0; return readl(ac97_reg_base + MODR); } EXPORT_SYMBOL_GPL(pxa2xx_ac97_read_modr); u32 pxa2xx_ac97_read_misr(void) { if (!ac97_reg_base) return 0; return readl(ac97_reg_base + MISR); } EXPORT_SYMBOL_GPL(pxa2xx_ac97_read_misr); MODULE_AUTHOR("Nicolas Pitre"); MODULE_DESCRIPTION("Intel/Marvell PXA sound library"); MODULE_LICENSE("GPL");