blob: 29a35ae5ffb96333ea68b388b9da650c68936ff2 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
* Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
*/
#include <common.h>
#include <dm.h>
#include <dm/device.h>
#include <generic-phy.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <asm/arch/sys_proto.h>
#include <syscon.h>
#include <regmap.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/printk.h>
/* PLLCTRL Registers */
#define PLL_STATUS 0x00000004
#define PLL_GO 0x00000008
#define PLL_CONFIGURATION1 0x0000000C
#define PLL_CONFIGURATION2 0x00000010
#define PLL_CONFIGURATION3 0x00000014
#define PLL_CONFIGURATION4 0x00000020
#define PLL_REGM_MASK 0x001FFE00
#define PLL_REGM_SHIFT 9
#define PLL_REGM_F_MASK 0x0003FFFF
#define PLL_REGM_F_SHIFT 0
#define PLL_REGN_MASK 0x000001FE
#define PLL_REGN_SHIFT 1
#define PLL_SELFREQDCO_MASK 0x0000000E
#define PLL_SELFREQDCO_SHIFT 1
#define PLL_SD_MASK 0x0003FC00
#define PLL_SD_SHIFT 10
#define SET_PLL_GO 0x1
#define PLL_TICOPWDN BIT(16)
#define PLL_LDOPWDN BIT(15)
#define PLL_LOCK 0x2
#define PLL_IDLE 0x1
/* Software rest for the SATA PLL (in CTRL_CORE_SMA_SW_0 register)*/
#define SATA_PLL_SOFT_RESET (1<<18)
/* PHY POWER CONTROL Register */
#define PIPE3_PHY_PWRCTL_CLK_CMD_MASK GENMASK(21, 14)
#define PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT 14
#define PIPE3_PHY_PWRCTL_CLK_FREQ_MASK GENMASK(31, 22)
#define PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT 22
#define PIPE3_PHY_RX_POWERON (0x1 << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT)
#define PIPE3_PHY_TX_POWERON (0x2 << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT)
/* PHY RX Registers */
#define PIPE3_PHY_RX_ANA_PROGRAMMABILITY 0x0000000C
#define INTERFACE_MASK GENMASK(31, 27)
#define INTERFACE_SHIFT 27
#define INTERFACE_MODE_USBSS BIT(4)
#define INTERFACE_MODE_SATA_1P5 BIT(3)
#define INTERFACE_MODE_SATA_3P0 BIT(2)
#define INTERFACE_MODE_PCIE BIT(0)
#define LOSD_MASK GENMASK(17, 14)
#define LOSD_SHIFT 14
#define MEM_PLLDIV GENMASK(6, 5)
#define PIPE3_PHY_RX_TRIM 0x0000001C
#define MEM_DLL_TRIM_SEL_MASK GENMASK(31, 30)
#define MEM_DLL_TRIM_SHIFT 30
#define PIPE3_PHY_RX_DLL 0x00000024
#define MEM_DLL_PHINT_RATE_MASK GENMASK(31, 30)
#define MEM_DLL_PHINT_RATE_SHIFT 30
#define PIPE3_PHY_RX_DIGITAL_MODES 0x00000028
#define MEM_HS_RATE_MASK GENMASK(28, 27)
#define MEM_HS_RATE_SHIFT 27
#define MEM_OVRD_HS_RATE BIT(26)
#define MEM_OVRD_HS_RATE_SHIFT 26
#define MEM_CDR_FASTLOCK BIT(23)
#define MEM_CDR_FASTLOCK_SHIFT 23
#define MEM_CDR_LBW_MASK GENMASK(22, 21)
#define MEM_CDR_LBW_SHIFT 21
#define MEM_CDR_STEPCNT_MASK GENMASK(20, 19)
#define MEM_CDR_STEPCNT_SHIFT 19
#define MEM_CDR_STL_MASK GENMASK(18, 16)
#define MEM_CDR_STL_SHIFT 16
#define MEM_CDR_THR_MASK GENMASK(15, 13)
#define MEM_CDR_THR_SHIFT 13
#define MEM_CDR_THR_MODE BIT(12)
#define MEM_CDR_THR_MODE_SHIFT 12
#define MEM_CDR_2NDO_SDM_MODE BIT(11)
#define MEM_CDR_2NDO_SDM_MODE_SHIFT 11
#define PIPE3_PHY_RX_EQUALIZER 0x00000038
#define MEM_EQLEV_MASK GENMASK(31, 16)
#define MEM_EQLEV_SHIFT 16
#define MEM_EQFTC_MASK GENMASK(15, 11)
#define MEM_EQFTC_SHIFT 11
#define MEM_EQCTL_MASK GENMASK(10, 7)
#define MEM_EQCTL_SHIFT 7
#define MEM_OVRD_EQLEV BIT(2)
#define MEM_OVRD_EQLEV_SHIFT 2
#define MEM_OVRD_EQFTC BIT(1)
#define MEM_OVRD_EQFTC_SHIFT 1
#define SATA_PHY_RX_IO_AND_A2D_OVERRIDES 0x44
#define MEM_CDR_LOS_SOURCE_MASK GENMASK(10, 9)
#define MEM_CDR_LOS_SOURCE_SHIFT 9
#define PLL_IDLE_TIME 100 /* in milliseconds */
#define PLL_LOCK_TIME 100 /* in milliseconds */
enum pipe3_mode { PIPE3_MODE_PCIE = 1,
PIPE3_MODE_SATA,
PIPE3_MODE_USBSS };
struct pipe3_settings {
u8 ana_interface;
u8 ana_losd;
u8 dig_fastlock;
u8 dig_lbw;
u8 dig_stepcnt;
u8 dig_stl;
u8 dig_thr;
u8 dig_thr_mode;
u8 dig_2ndo_sdm_mode;
u8 dig_hs_rate;
u8 dig_ovrd_hs_rate;
u8 dll_trim_sel;
u8 dll_phint_rate;
u8 eq_lev;
u8 eq_ftc;
u8 eq_ctl;
u8 eq_ovrd_lev;
u8 eq_ovrd_ftc;
};
struct omap_pipe3 {
void __iomem *pll_ctrl_base;
void __iomem *phy_rx;
void __iomem *power_reg;
void __iomem *pll_reset_reg;
struct pipe3_dpll_map *dpll_map;
enum pipe3_mode mode;
struct pipe3_settings settings;
};
struct pipe3_dpll_params {
u16 m;
u8 n;
u8 freq:3;
u8 sd;
u32 mf;
};
struct pipe3_dpll_map {
unsigned long rate;
struct pipe3_dpll_params params;
};
struct pipe3_data {
enum pipe3_mode mode;
struct pipe3_dpll_map *dpll_map;
struct pipe3_settings settings;
};
static inline u32 omap_pipe3_readl(void __iomem *addr, unsigned offset)
{
return readl(addr + offset);
}
static inline void omap_pipe3_writel(void __iomem *addr, unsigned offset,
u32 data)
{
writel(data, addr + offset);
}
static struct pipe3_dpll_params *omap_pipe3_get_dpll_params(struct omap_pipe3
*pipe3)
{
u32 rate;
struct pipe3_dpll_map *dpll_map = pipe3->dpll_map;
rate = get_sys_clk_freq();
for (; dpll_map->rate; dpll_map++) {
if (rate == dpll_map->rate)
return &dpll_map->params;
}
printf("%s: No DPLL configuration for %u Hz SYS CLK\n",
__func__, rate);
return NULL;
}
static int omap_pipe3_wait_lock(struct omap_pipe3 *pipe3)
{
u32 val;
int timeout = PLL_LOCK_TIME;
do {
mdelay(1);
val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS);
if (val & PLL_LOCK)
break;
} while (--timeout);
if (!(val & PLL_LOCK)) {
printf("%s: DPLL failed to lock\n", __func__);
return -EBUSY;
}
return 0;
}
static int omap_pipe3_dpll_program(struct omap_pipe3 *pipe3)
{
u32 val;
struct pipe3_dpll_params *dpll_params;
dpll_params = omap_pipe3_get_dpll_params(pipe3);
if (!dpll_params) {
printf("%s: Invalid DPLL parameters\n", __func__);
return -EINVAL;
}
val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION1);
val &= ~PLL_REGN_MASK;
val |= dpll_params->n << PLL_REGN_SHIFT;
omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION1, val);
val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION2);
val &= ~(PLL_SELFREQDCO_MASK | PLL_IDLE);
val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT;
omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION2, val);
val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION1);
val &= ~PLL_REGM_MASK;
val |= dpll_params->m << PLL_REGM_SHIFT;
omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION1, val);
val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION4);
val &= ~PLL_REGM_F_MASK;
val |= dpll_params->mf << PLL_REGM_F_SHIFT;
omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION4, val);
val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION3);
val &= ~PLL_SD_MASK;
val |= dpll_params->sd << PLL_SD_SHIFT;
omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION3, val);
omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_GO, SET_PLL_GO);
return omap_pipe3_wait_lock(pipe3);
}
static void omap_control_pipe3_power(struct omap_pipe3 *pipe3, int on)
{
u32 val, rate;
val = readl(pipe3->power_reg);
rate = get_sys_clk_freq();
rate = rate/1000000;
if (on) {
val &= ~(PIPE3_PHY_PWRCTL_CLK_CMD_MASK |
PIPE3_PHY_PWRCTL_CLK_FREQ_MASK);
val |= rate << PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT;
writel(val, pipe3->power_reg);
/* Power up TX before RX for SATA & USB */
val |= PIPE3_PHY_TX_POWERON;
writel(val, pipe3->power_reg);
val |= PIPE3_PHY_RX_POWERON;
writel(val, pipe3->power_reg);
} else {
val &= ~PIPE3_PHY_PWRCTL_CLK_CMD_MASK;
writel(val, pipe3->power_reg);
}
}
static void ti_pipe3_calibrate(struct omap_pipe3 *phy)
{
u32 val;
struct pipe3_settings *s = &phy->settings;
val = omap_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_ANA_PROGRAMMABILITY);
val &= ~(INTERFACE_MASK | LOSD_MASK | MEM_PLLDIV);
val = (s->ana_interface << INTERFACE_SHIFT | s->ana_losd << LOSD_SHIFT);
omap_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_ANA_PROGRAMMABILITY, val);
val = omap_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_DIGITAL_MODES);
val &= ~(MEM_HS_RATE_MASK | MEM_OVRD_HS_RATE | MEM_CDR_FASTLOCK |
MEM_CDR_LBW_MASK | MEM_CDR_STEPCNT_MASK | MEM_CDR_STL_MASK |
MEM_CDR_THR_MASK | MEM_CDR_THR_MODE | MEM_CDR_2NDO_SDM_MODE);
val |= s->dig_hs_rate << MEM_HS_RATE_SHIFT |
s->dig_ovrd_hs_rate << MEM_OVRD_HS_RATE_SHIFT |
s->dig_fastlock << MEM_CDR_FASTLOCK_SHIFT |
s->dig_lbw << MEM_CDR_LBW_SHIFT |
s->dig_stepcnt << MEM_CDR_STEPCNT_SHIFT |
s->dig_stl << MEM_CDR_STL_SHIFT |
s->dig_thr << MEM_CDR_THR_SHIFT |
s->dig_thr_mode << MEM_CDR_THR_MODE_SHIFT |
s->dig_2ndo_sdm_mode << MEM_CDR_2NDO_SDM_MODE_SHIFT;
omap_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_DIGITAL_MODES, val);
val = omap_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_TRIM);
val &= ~MEM_DLL_TRIM_SEL_MASK;
val |= s->dll_trim_sel << MEM_DLL_TRIM_SHIFT;
omap_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_TRIM, val);
val = omap_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_DLL);
val &= ~MEM_DLL_PHINT_RATE_MASK;
val |= s->dll_phint_rate << MEM_DLL_PHINT_RATE_SHIFT;
omap_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_DLL, val);
val = omap_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_EQUALIZER);
val &= ~(MEM_EQLEV_MASK | MEM_EQFTC_MASK | MEM_EQCTL_MASK |
MEM_OVRD_EQLEV | MEM_OVRD_EQFTC);
val |= s->eq_lev << MEM_EQLEV_SHIFT |
s->eq_ftc << MEM_EQFTC_SHIFT |
s->eq_ctl << MEM_EQCTL_SHIFT |
s->eq_ovrd_lev << MEM_OVRD_EQLEV_SHIFT |
s->eq_ovrd_ftc << MEM_OVRD_EQFTC_SHIFT;
omap_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_EQUALIZER, val);
if (phy->mode == PIPE3_MODE_SATA) {
val = omap_pipe3_readl(phy->phy_rx,
SATA_PHY_RX_IO_AND_A2D_OVERRIDES);
val &= ~MEM_CDR_LOS_SOURCE_MASK;
omap_pipe3_writel(phy->phy_rx, SATA_PHY_RX_IO_AND_A2D_OVERRIDES,
val);
}
}
static int pipe3_init(struct phy *phy)
{
int ret;
u32 val;
struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev);
/* Program the DPLL only if not locked */
val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS);
if (!(val & PLL_LOCK)) {
ret = omap_pipe3_dpll_program(pipe3);
if (ret)
return ret;
ti_pipe3_calibrate(pipe3);
} else {
/* else just bring it out of IDLE mode */
val = omap_pipe3_readl(pipe3->pll_ctrl_base,
PLL_CONFIGURATION2);
if (val & PLL_IDLE) {
val &= ~PLL_IDLE;
omap_pipe3_writel(pipe3->pll_ctrl_base,
PLL_CONFIGURATION2, val);
ret = omap_pipe3_wait_lock(pipe3);
if (ret)
return ret;
}
}
return 0;
}
static int pipe3_power_on(struct phy *phy)
{
struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev);
/* Power up the PHY */
omap_control_pipe3_power(pipe3, 1);
return 0;
}
static int pipe3_power_off(struct phy *phy)
{
struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev);
/* Power down the PHY */
omap_control_pipe3_power(pipe3, 0);
return 0;
}
static int pipe3_exit(struct phy *phy)
{
u32 val;
int timeout = PLL_IDLE_TIME;
struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev);
pipe3_power_off(phy);
/* Put DPLL in IDLE mode */
val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION2);
val |= PLL_IDLE;
omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION2, val);
/* wait for LDO and Oscillator to power down */
do {
mdelay(1);
val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS);
if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN))
break;
} while (--timeout);
if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) {
pr_err("%s: Failed to power down DPLL: PLL_STATUS 0x%x\n",
__func__, val);
return -EBUSY;
}
if (pipe3->pll_reset_reg) {
val = readl(pipe3->pll_reset_reg);
writel(val | SATA_PLL_SOFT_RESET, pipe3->pll_reset_reg);
mdelay(1);
writel(val & ~SATA_PLL_SOFT_RESET, pipe3->pll_reset_reg);
}
return 0;
}
static void *get_reg(struct udevice *dev, const char *name)
{
struct udevice *syscon;
struct regmap *regmap;
const fdt32_t *cell;
int len, err;
void *base;
err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
name, &syscon);
if (err) {
pr_err("unable to find syscon device for %s (%d)\n",
name, err);
return NULL;
}
regmap = syscon_get_regmap(syscon);
if (IS_ERR(regmap)) {
pr_err("unable to find regmap for %s (%ld)\n",
name, PTR_ERR(regmap));
return NULL;
}
cell = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), name,
&len);
if (len < 2*sizeof(fdt32_t)) {
pr_err("offset not available for %s\n", name);
return NULL;
}
base = regmap_get_range(regmap, 0);
if (!base)
return NULL;
return fdtdec_get_number(cell + 1, 1) + base;
}
static int pipe3_phy_probe(struct udevice *dev)
{
fdt_addr_t addr;
fdt_size_t sz;
struct omap_pipe3 *pipe3 = dev_get_priv(dev);
struct pipe3_data *data;
/* PHY_RX */
addr = devfdt_get_addr_size_index(dev, 0, &sz);
if (addr == FDT_ADDR_T_NONE) {
pr_err("missing phy_rx address\n");
return -EINVAL;
}
pipe3->phy_rx = map_physmem(addr, sz, MAP_NOCACHE);
if (!pipe3->phy_rx) {
pr_err("unable to remap phy_rx\n");
return -EINVAL;
}
/* PLLCTRL */
addr = devfdt_get_addr_size_index(dev, 2, &sz);
if (addr == FDT_ADDR_T_NONE) {
pr_err("missing pll ctrl address\n");
return -EINVAL;
}
pipe3->pll_ctrl_base = map_physmem(addr, sz, MAP_NOCACHE);
if (!pipe3->pll_ctrl_base) {
pr_err("unable to remap pll ctrl\n");
return -EINVAL;
}
pipe3->power_reg = get_reg(dev, "syscon-phy-power");
if (!pipe3->power_reg)
return -EINVAL;
data = (struct pipe3_data *)dev_get_driver_data(dev);
pipe3->mode = data->mode;
pipe3->dpll_map = data->dpll_map;
pipe3->settings = data->settings;
if (pipe3->mode == PIPE3_MODE_SATA) {
pipe3->pll_reset_reg = get_reg(dev, "syscon-pllreset");
if (!pipe3->pll_reset_reg)
return -EINVAL;
}
return 0;
}
static struct pipe3_dpll_map dpll_map_sata[] = {
{12000000, {625, 4, 4, 6, 0} }, /* 12 MHz */
{16800000, {625, 6, 4, 7, 0} }, /* 16.8 MHz */
{19200000, {625, 7, 4, 6, 0} }, /* 19.2 MHz */
{20000000, {750, 9, 4, 6, 0} }, /* 20 MHz */
{26000000, {750, 12, 4, 6, 0} }, /* 26 MHz */
{38400000, {625, 15, 4, 6, 0} }, /* 38.4 MHz */
{ }, /* Terminator */
};
static struct pipe3_dpll_map dpll_map_usb[] = {
{12000000, {1250, 5, 4, 20, 0} }, /* 12 MHz */
{16800000, {3125, 20, 4, 20, 0} }, /* 16.8 MHz */
{19200000, {1172, 8, 4, 20, 65537} }, /* 19.2 MHz */
{20000000, {1000, 7, 4, 10, 0} }, /* 20 MHz */
{26000000, {1250, 12, 4, 20, 0} }, /* 26 MHz */
{38400000, {3125, 47, 4, 20, 92843} }, /* 38.4 MHz */
{ }, /* Terminator */
};
static struct pipe3_data data_usb = {
.mode = PIPE3_MODE_USBSS,
.dpll_map = dpll_map_usb,
.settings = {
/* DRA75x TRM Table 26-17. Preferred USB3_PHY_RX SCP Register Settings */
.ana_interface = INTERFACE_MODE_USBSS,
.ana_losd = 0xa,
.dig_fastlock = 1,
.dig_lbw = 3,
.dig_stepcnt = 0,
.dig_stl = 0x3,
.dig_thr = 1,
.dig_thr_mode = 1,
.dig_2ndo_sdm_mode = 0,
.dig_hs_rate = 0,
.dig_ovrd_hs_rate = 1,
.dll_trim_sel = 0x2,
.dll_phint_rate = 0x3,
.eq_lev = 0,
.eq_ftc = 0,
.eq_ctl = 0x9,
.eq_ovrd_lev = 0,
.eq_ovrd_ftc = 0,
},
};
static struct pipe3_data data_sata = {
.mode = PIPE3_MODE_SATA,
.dpll_map = dpll_map_sata,
.settings = {
/* DRA75x TRM Table 26-9. Preferred SATA_PHY_RX SCP Register Settings */
.ana_interface = INTERFACE_MODE_SATA_3P0,
.ana_losd = 0x5,
.dig_fastlock = 1,
.dig_lbw = 3,
.dig_stepcnt = 0,
.dig_stl = 0x3,
.dig_thr = 1,
.dig_thr_mode = 1,
.dig_2ndo_sdm_mode = 0,
.dig_hs_rate = 0, /* Not in TRM preferred settings */
.dig_ovrd_hs_rate = 0, /* Not in TRM preferred settings */
.dll_trim_sel = 0x1,
.dll_phint_rate = 0x2, /* for 1.5 GHz DPLL clock */
.eq_lev = 0,
.eq_ftc = 0x1f,
.eq_ctl = 0,
.eq_ovrd_lev = 1,
.eq_ovrd_ftc = 1,
},
};
static const struct udevice_id pipe3_phy_ids[] = {
{ .compatible = "ti,phy-pipe3-sata", .data = (ulong)&data_sata },
{ .compatible = "ti,omap-usb3", .data = (ulong)&data_usb},
{ }
};
static struct phy_ops pipe3_phy_ops = {
.init = pipe3_init,
.power_on = pipe3_power_on,
.power_off = pipe3_power_off,
.exit = pipe3_exit,
};
U_BOOT_DRIVER(pipe3_phy) = {
.name = "pipe3_phy",
.id = UCLASS_PHY,
.of_match = pipe3_phy_ids,
.ops = &pipe3_phy_ops,
.probe = pipe3_phy_probe,
.priv_auto = sizeof(struct omap_pipe3),
};