| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Kamil Debski | 819 | 100.00% | 1 | 100.00% |
| Total | 819 | 1 |
/* * Samsung SoC USB 1.1/2.0 PHY driver - Exynos 4210 support * * Copyright (C) 2013 Samsung Electronics Co., Ltd. * Author: Kamil Debski <k.debski@samsung.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/delay.h> #include <linux/io.h> #include <linux/phy/phy.h> #include <linux/regmap.h> #include "phy-samsung-usb2.h" /* Exynos USB PHY registers */ /* PHY power control */ #define EXYNOS_4210_UPHYPWR 0x0 #define EXYNOS_4210_UPHYPWR_PHY0_SUSPEND BIT(0) #define EXYNOS_4210_UPHYPWR_PHY0_PWR BIT(3) #define EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR BIT(4) #define EXYNOS_4210_UPHYPWR_PHY0_SLEEP BIT(5) #define EXYNOS_4210_UPHYPWR_PHY0 ( \ EXYNOS_4210_UPHYPWR_PHY0_SUSPEND | \ EXYNOS_4210_UPHYPWR_PHY0_PWR | \ EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR | \ EXYNOS_4210_UPHYPWR_PHY0_SLEEP) #define EXYNOS_4210_UPHYPWR_PHY1_SUSPEND BIT(6) #define EXYNOS_4210_UPHYPWR_PHY1_PWR BIT(7) #define EXYNOS_4210_UPHYPWR_PHY1_SLEEP BIT(8) #define EXYNOS_4210_UPHYPWR_PHY1 ( \ EXYNOS_4210_UPHYPWR_PHY1_SUSPEND | \ EXYNOS_4210_UPHYPWR_PHY1_PWR | \ EXYNOS_4210_UPHYPWR_PHY1_SLEEP) #define EXYNOS_4210_UPHYPWR_HSIC0_SUSPEND BIT(9) #define EXYNOS_4210_UPHYPWR_HSIC0_SLEEP BIT(10) #define EXYNOS_4210_UPHYPWR_HSIC0 ( \ EXYNOS_4210_UPHYPWR_HSIC0_SUSPEND | \ EXYNOS_4210_UPHYPWR_HSIC0_SLEEP) #define EXYNOS_4210_UPHYPWR_HSIC1_SUSPEND BIT(11) #define EXYNOS_4210_UPHYPWR_HSIC1_SLEEP BIT(12) #define EXYNOS_4210_UPHYPWR_HSIC1 ( \ EXYNOS_4210_UPHYPWR_HSIC1_SUSPEND | \ EXYNOS_4210_UPHYPWR_HSIC1_SLEEP) /* PHY clock control */ #define EXYNOS_4210_UPHYCLK 0x4 #define EXYNOS_4210_UPHYCLK_PHYFSEL_MASK (0x3 << 0) #define EXYNOS_4210_UPHYCLK_PHYFSEL_OFFSET 0 #define EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ (0x0 << 0) #define EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ (0x3 << 0) #define EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0) #define EXYNOS_4210_UPHYCLK_PHY0_ID_PULLUP BIT(2) #define EXYNOS_4210_UPHYCLK_PHY0_COMMON_ON BIT(4) #define EXYNOS_4210_UPHYCLK_PHY1_COMMON_ON BIT(7) /* PHY reset control */ #define EXYNOS_4210_UPHYRST 0x8 #define EXYNOS_4210_URSTCON_PHY0 BIT(0) #define EXYNOS_4210_URSTCON_OTG_HLINK BIT(1) #define EXYNOS_4210_URSTCON_OTG_PHYLINK BIT(2) #define EXYNOS_4210_URSTCON_PHY1_ALL BIT(3) #define EXYNOS_4210_URSTCON_PHY1_P0 BIT(4) #define EXYNOS_4210_URSTCON_PHY1_P1P2 BIT(5) #define EXYNOS_4210_URSTCON_HOST_LINK_ALL BIT(6) #define EXYNOS_4210_URSTCON_HOST_LINK_P0 BIT(7) #define EXYNOS_4210_URSTCON_HOST_LINK_P1 BIT(8) #define EXYNOS_4210_URSTCON_HOST_LINK_P2 BIT(9) /* Isolation, configured in the power management unit */ #define EXYNOS_4210_USB_ISOL_DEVICE_OFFSET 0x704 #define EXYNOS_4210_USB_ISOL_DEVICE BIT(0) #define EXYNOS_4210_USB_ISOL_HOST_OFFSET 0x708 #define EXYNOS_4210_USB_ISOL_HOST BIT(0) /* USBYPHY1 Floating prevention */ #define EXYNOS_4210_UPHY1CON 0x34 #define EXYNOS_4210_UPHY1CON_FLOAT_PREVENTION 0x1 /* Mode switching SUB Device <-> Host */ #define EXYNOS_4210_MODE_SWITCH_OFFSET 0x21c #define EXYNOS_4210_MODE_SWITCH_MASK 1 #define EXYNOS_4210_MODE_SWITCH_DEVICE 0 #define EXYNOS_4210_MODE_SWITCH_HOST 1 enum exynos4210_phy_id { EXYNOS4210_DEVICE, EXYNOS4210_HOST, EXYNOS4210_HSIC0, EXYNOS4210_HSIC1, EXYNOS4210_NUM_PHYS, }; /* * exynos4210_rate_to_clk() converts the supplied clock rate to the value that * can be written to the phy register. */ static int exynos4210_rate_to_clk(unsigned long rate, u32 *reg) { switch (rate) { case 12 * MHZ: *reg = EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ; break; case 24 * MHZ: *reg = EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ; break; case 48 * MHZ: *reg = EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ; break; default: return -EINVAL; } return 0; } static void exynos4210_isol(struct samsung_usb2_phy_instance *inst, bool on) { struct samsung_usb2_phy_driver *drv = inst->drv; u32 offset; u32 mask; switch (inst->cfg->id) { case EXYNOS4210_DEVICE: offset = EXYNOS_4210_USB_ISOL_DEVICE_OFFSET; mask = EXYNOS_4210_USB_ISOL_DEVICE; break; case EXYNOS4210_HOST: offset = EXYNOS_4210_USB_ISOL_HOST_OFFSET; mask = EXYNOS_4210_USB_ISOL_HOST; break; default: return; } regmap_update_bits(drv->reg_pmu, offset, mask, on ? 0 : mask); } static void exynos4210_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on) { struct samsung_usb2_phy_driver *drv = inst->drv; u32 rstbits = 0; u32 phypwr = 0; u32 rst; u32 pwr; u32 clk; switch (inst->cfg->id) { case EXYNOS4210_DEVICE: phypwr = EXYNOS_4210_UPHYPWR_PHY0; rstbits = EXYNOS_4210_URSTCON_PHY0; break; case EXYNOS4210_HOST: phypwr = EXYNOS_4210_UPHYPWR_PHY1; rstbits = EXYNOS_4210_URSTCON_PHY1_ALL | EXYNOS_4210_URSTCON_PHY1_P0 | EXYNOS_4210_URSTCON_PHY1_P1P2 | EXYNOS_4210_URSTCON_HOST_LINK_ALL | EXYNOS_4210_URSTCON_HOST_LINK_P0; writel(on, drv->reg_phy + EXYNOS_4210_UPHY1CON); break; case EXYNOS4210_HSIC0: phypwr = EXYNOS_4210_UPHYPWR_HSIC0; rstbits = EXYNOS_4210_URSTCON_PHY1_P1P2 | EXYNOS_4210_URSTCON_HOST_LINK_P1; break; case EXYNOS4210_HSIC1: phypwr = EXYNOS_4210_UPHYPWR_HSIC1; rstbits = EXYNOS_4210_URSTCON_PHY1_P1P2 | EXYNOS_4210_URSTCON_HOST_LINK_P2; break; } if (on) { clk = readl(drv->reg_phy + EXYNOS_4210_UPHYCLK); clk &= ~EXYNOS_4210_UPHYCLK_PHYFSEL_MASK; clk |= drv->ref_reg_val << EXYNOS_4210_UPHYCLK_PHYFSEL_OFFSET; writel(clk, drv->reg_phy + EXYNOS_4210_UPHYCLK); pwr = readl(drv->reg_phy + EXYNOS_4210_UPHYPWR); pwr &= ~phypwr; writel(pwr, drv->reg_phy + EXYNOS_4210_UPHYPWR); rst = readl(drv->reg_phy + EXYNOS_4210_UPHYRST); rst |= rstbits; writel(rst, drv->reg_phy + EXYNOS_4210_UPHYRST); udelay(10); rst &= ~rstbits; writel(rst, drv->reg_phy + EXYNOS_4210_UPHYRST); /* The following delay is necessary for the reset sequence to be * completed */ udelay(80); } else { pwr = readl(drv->reg_phy + EXYNOS_4210_UPHYPWR); pwr |= phypwr; writel(pwr, drv->reg_phy + EXYNOS_4210_UPHYPWR); } } static int exynos4210_power_on(struct samsung_usb2_phy_instance *inst) { /* Order of initialisation is important - first power then isolation */ exynos4210_phy_pwr(inst, 1); exynos4210_isol(inst, 0); return 0; } static int exynos4210_power_off(struct samsung_usb2_phy_instance *inst) { exynos4210_isol(inst, 1); exynos4210_phy_pwr(inst, 0); return 0; } static const struct samsung_usb2_common_phy exynos4210_phys[] = { { .label = "device", .id = EXYNOS4210_DEVICE, .power_on = exynos4210_power_on, .power_off = exynos4210_power_off, }, { .label = "host", .id = EXYNOS4210_HOST, .power_on = exynos4210_power_on, .power_off = exynos4210_power_off, }, { .label = "hsic0", .id = EXYNOS4210_HSIC0, .power_on = exynos4210_power_on, .power_off = exynos4210_power_off, }, { .label = "hsic1", .id = EXYNOS4210_HSIC1, .power_on = exynos4210_power_on, .power_off = exynos4210_power_off, }, }; const struct samsung_usb2_phy_config exynos4210_usb2_phy_config = { .has_mode_switch = 0, .num_phys = EXYNOS4210_NUM_PHYS, .phys = exynos4210_phys, .rate_to_clk = exynos4210_rate_to_clk, };
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