--- /dev/null
+/*
+ * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
+ * Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/device.h>
+#include <generic-phy.h>
+#include <asm/io.h>
+#include <asm/arch/sys_proto.h>
+#include <syscon.h>
+#include <regmap.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 OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK 0x003FC000
+#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT 0xE
+
+#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK 0xFFC00000
+#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT 0x16
+
+#define OMAP_CTRL_PIPE3_PHY_TX_RX_POWERON 0x3
+#define OMAP_CTRL_PIPE3_PHY_TX_RX_POWEROFF 0x0
+
+
+#define PLL_IDLE_TIME 100 /* in milliseconds */
+#define PLL_LOCK_TIME 100 /* in milliseconds */
+
+struct omap_pipe3 {
+ void __iomem *pll_ctrl_base;
+ void __iomem *power_reg;
+ void __iomem *pll_reset_reg;
+ struct pipe3_dpll_map *dpll_map;
+};
+
+
+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;
+};
+
+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;
+ 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 &= ~(OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK |
+ OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK);
+ val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWERON <<
+ OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
+ val |= rate <<
+ OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT;
+ } else {
+ val &= ~OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK;
+ val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWEROFF <<
+ OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
+ }
+
+ writel(val, pipe3->power_reg);
+}
+
+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;
+ } 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)) {
+ error("%s: Failed to power down DPLL: PLL_STATUS 0x%x\n",
+ __func__, val);
+ return -EBUSY;
+ }
+
+ 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) {
+ error("unable to find syscon device for %s (%d)\n",
+ name, err);
+ return NULL;
+ }
+
+ regmap = syscon_get_regmap(syscon);
+ if (IS_ERR(regmap)) {
+ error("unable to find regmap for %s (%ld)\n",
+ name, PTR_ERR(regmap));
+ return NULL;
+ }
+
+ cell = fdt_getprop(gd->fdt_blob, dev->of_offset, name,
+ &len);
+ if (len < 2*sizeof(fdt32_t)) {
+ error("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);
+
+ addr = dev_get_addr_size_index(dev, 2, &sz);
+ if (addr == FDT_ADDR_T_NONE) {
+ error("missing pll ctrl address\n");
+ return -EINVAL;
+ }
+
+ pipe3->pll_ctrl_base = map_physmem(addr, sz, MAP_NOCACHE);
+ if (!pipe3->pll_ctrl_base) {
+ error("unable to remap pll ctrl\n");
+ return -EINVAL;
+ }
+
+ pipe3->power_reg = get_reg(dev, "syscon-phy-power");
+ if (!pipe3->power_reg)
+ return -EINVAL;
+
+ pipe3->pll_reset_reg = get_reg(dev, "syscon-pllreset");
+ if (!pipe3->pll_reset_reg)
+ return -EINVAL;
+
+ pipe3->dpll_map = (struct pipe3_dpll_map *)dev_get_driver_data(dev);
+
+ return 0;
+}
+
+static struct pipe3_dpll_map dpll_map_sata[] = {
+ {12000000, {1000, 7, 4, 6, 0} }, /* 12 MHz */
+ {16800000, {714, 7, 4, 6, 0} }, /* 16.8 MHz */
+ {19200000, {625, 7, 4, 6, 0} }, /* 19.2 MHz */
+ {20000000, {600, 7, 4, 6, 0} }, /* 20 MHz */
+ {26000000, {461, 7, 4, 6, 0} }, /* 26 MHz */
+ {38400000, {312, 7, 4, 6, 0} }, /* 38.4 MHz */
+ { }, /* Terminator */
+};
+
+static const struct udevice_id pipe3_phy_ids[] = {
+ { .compatible = "ti,phy-pipe3-sata", .data = (ulong)&dpll_map_sata },
+ { }
+};
+
+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_alloc_size = sizeof(struct omap_pipe3),
+};
projects / oweals / u-boot.git / commitdiff