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372 lines
9.2 KiB
372 lines
9.2 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ |
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* Written by Jean-Jacques Hiblot <[email protected]> |
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*/ |
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#include <common.h> |
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#include <dm.h> |
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#include <dm/device.h> |
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#include <generic-phy.h> |
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#include <asm/io.h> |
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#include <asm/arch/sys_proto.h> |
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#include <syscon.h> |
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#include <regmap.h> |
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/* PLLCTRL Registers */ |
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#define PLL_STATUS 0x00000004 |
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#define PLL_GO 0x00000008 |
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#define PLL_CONFIGURATION1 0x0000000C |
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#define PLL_CONFIGURATION2 0x00000010 |
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#define PLL_CONFIGURATION3 0x00000014 |
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#define PLL_CONFIGURATION4 0x00000020 |
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#define PLL_REGM_MASK 0x001FFE00 |
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#define PLL_REGM_SHIFT 9 |
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#define PLL_REGM_F_MASK 0x0003FFFF |
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#define PLL_REGM_F_SHIFT 0 |
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#define PLL_REGN_MASK 0x000001FE |
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#define PLL_REGN_SHIFT 1 |
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#define PLL_SELFREQDCO_MASK 0x0000000E |
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#define PLL_SELFREQDCO_SHIFT 1 |
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#define PLL_SD_MASK 0x0003FC00 |
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#define PLL_SD_SHIFT 10 |
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#define SET_PLL_GO 0x1 |
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#define PLL_TICOPWDN BIT(16) |
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#define PLL_LDOPWDN BIT(15) |
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#define PLL_LOCK 0x2 |
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#define PLL_IDLE 0x1 |
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/* Software rest for the SATA PLL (in CTRL_CORE_SMA_SW_0 register)*/ |
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#define SATA_PLL_SOFT_RESET (1<<18) |
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/* PHY POWER CONTROL Register */ |
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#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK 0x003FC000 |
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#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT 0xE |
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#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK 0xFFC00000 |
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#define OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT 0x16 |
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#define OMAP_CTRL_PIPE3_PHY_TX_RX_POWERON 0x3 |
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#define OMAP_CTRL_PIPE3_PHY_TX_RX_POWEROFF 0x0 |
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#define PLL_IDLE_TIME 100 /* in milliseconds */ |
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#define PLL_LOCK_TIME 100 /* in milliseconds */ |
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struct omap_pipe3 { |
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void __iomem *pll_ctrl_base; |
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void __iomem *power_reg; |
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void __iomem *pll_reset_reg; |
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struct pipe3_dpll_map *dpll_map; |
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}; |
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struct pipe3_dpll_params { |
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u16 m; |
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u8 n; |
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u8 freq:3; |
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u8 sd; |
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u32 mf; |
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}; |
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struct pipe3_dpll_map { |
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unsigned long rate; |
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struct pipe3_dpll_params params; |
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}; |
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static inline u32 omap_pipe3_readl(void __iomem *addr, unsigned offset) |
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{ |
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return readl(addr + offset); |
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} |
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static inline void omap_pipe3_writel(void __iomem *addr, unsigned offset, |
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u32 data) |
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{ |
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writel(data, addr + offset); |
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} |
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static struct pipe3_dpll_params *omap_pipe3_get_dpll_params(struct omap_pipe3 |
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*pipe3) |
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{ |
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u32 rate; |
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struct pipe3_dpll_map *dpll_map = pipe3->dpll_map; |
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rate = get_sys_clk_freq(); |
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for (; dpll_map->rate; dpll_map++) { |
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if (rate == dpll_map->rate) |
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return &dpll_map->params; |
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} |
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printf("%s: No DPLL configuration for %u Hz SYS CLK\n", |
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__func__, rate); |
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return NULL; |
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} |
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static int omap_pipe3_wait_lock(struct omap_pipe3 *pipe3) |
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{ |
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u32 val; |
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int timeout = PLL_LOCK_TIME; |
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do { |
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mdelay(1); |
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val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS); |
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if (val & PLL_LOCK) |
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break; |
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} while (--timeout); |
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if (!(val & PLL_LOCK)) { |
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printf("%s: DPLL failed to lock\n", __func__); |
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return -EBUSY; |
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} |
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return 0; |
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} |
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static int omap_pipe3_dpll_program(struct omap_pipe3 *pipe3) |
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{ |
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u32 val; |
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struct pipe3_dpll_params *dpll_params; |
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dpll_params = omap_pipe3_get_dpll_params(pipe3); |
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if (!dpll_params) { |
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printf("%s: Invalid DPLL parameters\n", __func__); |
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return -EINVAL; |
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} |
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val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION1); |
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val &= ~PLL_REGN_MASK; |
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val |= dpll_params->n << PLL_REGN_SHIFT; |
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omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION1, val); |
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val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION2); |
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val &= ~PLL_SELFREQDCO_MASK; |
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val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT; |
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omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION2, val); |
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val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION1); |
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val &= ~PLL_REGM_MASK; |
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val |= dpll_params->m << PLL_REGM_SHIFT; |
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omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION1, val); |
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val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION4); |
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val &= ~PLL_REGM_F_MASK; |
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val |= dpll_params->mf << PLL_REGM_F_SHIFT; |
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omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION4, val); |
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val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION3); |
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val &= ~PLL_SD_MASK; |
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val |= dpll_params->sd << PLL_SD_SHIFT; |
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omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION3, val); |
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omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_GO, SET_PLL_GO); |
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return omap_pipe3_wait_lock(pipe3); |
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} |
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static void omap_control_pipe3_power(struct omap_pipe3 *pipe3, int on) |
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{ |
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u32 val, rate; |
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val = readl(pipe3->power_reg); |
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rate = get_sys_clk_freq(); |
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rate = rate/1000000; |
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if (on) { |
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val &= ~(OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK | |
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OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK); |
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val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWERON << |
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OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; |
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val |= rate << |
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OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT; |
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} else { |
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val &= ~OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK; |
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val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWEROFF << |
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OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; |
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} |
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writel(val, pipe3->power_reg); |
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} |
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static int pipe3_init(struct phy *phy) |
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{ |
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int ret; |
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u32 val; |
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struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); |
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/* Program the DPLL only if not locked */ |
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val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS); |
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if (!(val & PLL_LOCK)) { |
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ret = omap_pipe3_dpll_program(pipe3); |
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if (ret) |
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return ret; |
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} else { |
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/* else just bring it out of IDLE mode */ |
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val = omap_pipe3_readl(pipe3->pll_ctrl_base, |
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PLL_CONFIGURATION2); |
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if (val & PLL_IDLE) { |
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val &= ~PLL_IDLE; |
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omap_pipe3_writel(pipe3->pll_ctrl_base, |
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PLL_CONFIGURATION2, val); |
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ret = omap_pipe3_wait_lock(pipe3); |
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if (ret) |
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return ret; |
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} |
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} |
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return 0; |
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} |
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static int pipe3_power_on(struct phy *phy) |
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{ |
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struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); |
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/* Power up the PHY */ |
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omap_control_pipe3_power(pipe3, 1); |
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return 0; |
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} |
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static int pipe3_power_off(struct phy *phy) |
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{ |
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struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); |
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/* Power down the PHY */ |
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omap_control_pipe3_power(pipe3, 0); |
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return 0; |
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} |
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static int pipe3_exit(struct phy *phy) |
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{ |
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u32 val; |
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int timeout = PLL_IDLE_TIME; |
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struct omap_pipe3 *pipe3 = dev_get_priv(phy->dev); |
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pipe3_power_off(phy); |
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/* Put DPLL in IDLE mode */ |
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val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_CONFIGURATION2); |
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val |= PLL_IDLE; |
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omap_pipe3_writel(pipe3->pll_ctrl_base, PLL_CONFIGURATION2, val); |
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/* wait for LDO and Oscillator to power down */ |
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do { |
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mdelay(1); |
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val = omap_pipe3_readl(pipe3->pll_ctrl_base, PLL_STATUS); |
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if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN)) |
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break; |
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} while (--timeout); |
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if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) { |
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pr_err("%s: Failed to power down DPLL: PLL_STATUS 0x%x\n", |
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__func__, val); |
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return -EBUSY; |
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} |
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val = readl(pipe3->pll_reset_reg); |
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writel(val | SATA_PLL_SOFT_RESET, pipe3->pll_reset_reg); |
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mdelay(1); |
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writel(val & ~SATA_PLL_SOFT_RESET, pipe3->pll_reset_reg); |
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return 0; |
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} |
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static void *get_reg(struct udevice *dev, const char *name) |
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{ |
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struct udevice *syscon; |
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struct regmap *regmap; |
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const fdt32_t *cell; |
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int len, err; |
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void *base; |
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err = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, |
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name, &syscon); |
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if (err) { |
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pr_err("unable to find syscon device for %s (%d)\n", |
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name, err); |
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return NULL; |
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} |
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regmap = syscon_get_regmap(syscon); |
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if (IS_ERR(regmap)) { |
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pr_err("unable to find regmap for %s (%ld)\n", |
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name, PTR_ERR(regmap)); |
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return NULL; |
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} |
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cell = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), name, |
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&len); |
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if (len < 2*sizeof(fdt32_t)) { |
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pr_err("offset not available for %s\n", name); |
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return NULL; |
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} |
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base = regmap_get_range(regmap, 0); |
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if (!base) |
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return NULL; |
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return fdtdec_get_number(cell + 1, 1) + base; |
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} |
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static int pipe3_phy_probe(struct udevice *dev) |
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{ |
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fdt_addr_t addr; |
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fdt_size_t sz; |
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struct omap_pipe3 *pipe3 = dev_get_priv(dev); |
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addr = devfdt_get_addr_size_index(dev, 2, &sz); |
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if (addr == FDT_ADDR_T_NONE) { |
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pr_err("missing pll ctrl address\n"); |
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return -EINVAL; |
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} |
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pipe3->pll_ctrl_base = map_physmem(addr, sz, MAP_NOCACHE); |
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if (!pipe3->pll_ctrl_base) { |
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pr_err("unable to remap pll ctrl\n"); |
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return -EINVAL; |
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} |
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pipe3->power_reg = get_reg(dev, "syscon-phy-power"); |
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if (!pipe3->power_reg) |
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return -EINVAL; |
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pipe3->pll_reset_reg = get_reg(dev, "syscon-pllreset"); |
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if (!pipe3->pll_reset_reg) |
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return -EINVAL; |
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pipe3->dpll_map = (struct pipe3_dpll_map *)dev_get_driver_data(dev); |
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return 0; |
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} |
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static struct pipe3_dpll_map dpll_map_sata[] = { |
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{12000000, {1000, 7, 4, 6, 0} }, /* 12 MHz */ |
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{16800000, {714, 7, 4, 6, 0} }, /* 16.8 MHz */ |
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{19200000, {625, 7, 4, 6, 0} }, /* 19.2 MHz */ |
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{20000000, {600, 7, 4, 6, 0} }, /* 20 MHz */ |
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{26000000, {461, 7, 4, 6, 0} }, /* 26 MHz */ |
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{38400000, {312, 7, 4, 6, 0} }, /* 38.4 MHz */ |
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{ }, /* Terminator */ |
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}; |
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static const struct udevice_id pipe3_phy_ids[] = { |
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{ .compatible = "ti,phy-pipe3-sata", .data = (ulong)&dpll_map_sata }, |
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{ } |
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}; |
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static struct phy_ops pipe3_phy_ops = { |
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.init = pipe3_init, |
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.power_on = pipe3_power_on, |
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.power_off = pipe3_power_off, |
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.exit = pipe3_exit, |
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}; |
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U_BOOT_DRIVER(pipe3_phy) = { |
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.name = "pipe3_phy", |
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.id = UCLASS_PHY, |
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.of_match = pipe3_phy_ids, |
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.ops = &pipe3_phy_ops, |
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.probe = pipe3_phy_probe, |
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.priv_auto_alloc_size = sizeof(struct omap_pipe3), |
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};
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