| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Meson GXL and GXM USB2 PHY driver |
| * |
| * Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com> |
| * Copyright (C) 2018 BayLibre, SAS |
| * Author: Neil Armstrong <narmstron@baylibre.com> |
| */ |
| |
| #include <common.h> |
| #include <asm/io.h> |
| #include <bitfield.h> |
| #include <dm.h> |
| #include <errno.h> |
| #include <generic-phy.h> |
| #include <regmap.h> |
| #include <power/regulator.h> |
| #include <clk.h> |
| #include <asm/arch/usb.h> |
| #include <amlogic/cpu_id.h> |
| |
| #include <linux/compat.h> |
| #include <linux/ioport.h> |
| #include <asm-generic/gpio.h> |
| |
| #define U2_CTRL_SLEEP_SHIFT 17 |
| #define U2_HHI_MEM_PD_MASK 0x3 |
| #define U2_HHI_MEM_PD_SHIFT 30 |
| #define U2_CTRL_ISO_SHIFT 17 |
| #define PHY20_RESET_LEVEL_BIT 16 |
| #define PHY21_RESET_LEVEL_BIT 17 |
| #define USB_RESET_BIT 2 |
| |
| #define USB2_PHY_PLL_OFFSET_40 (0x09400414) |
| #define USB2_PHY_PLL_OFFSET_44 (0x927E0000) |
| #define USB2_PHY_PLL_OFFSET_48 (0xac5f49e5) |
| #define USB2_SM1_PHY_PLL_OFFSET_48 (0xac5f69e5) |
| |
| #define USB2_PHY_PLL_OFFSET_10 (0x80000fff) |
| #define USB2_PHY_PLL_OFFSET_34 (0x78000) |
| |
| #define USB2_PHY_PLL_OFFSET_38_CLEAR (0) |
| #define USB2_PHY_PLL_OFFSET_38_SET (0xe0004) |
| #define USB2_PHY_PLL_OFFSET_50 (0xfe18) |
| #define USB2_PHY_PLL_OFFSET_54 (0x2a) |
| |
| #define TUNING_DISCONNECT_THRESHOLD 0x34 |
| |
| static int Rev_flag = 0; |
| |
| static struct phy usb_phys[2]; |
| |
| /*Rev_flag == 0XB, g12b and revB, tl1 */ |
| /*Rev_flag == 1, sm1 */ |
| static void phy_aml_usb2_check_rev (void) |
| { |
| cpu_id_t cpu_id = get_cpu_id(); |
| |
| if (cpu_id.family_id == MESON_CPU_MAJOR_ID_G12B) { |
| if (cpu_id.chip_rev == 0xb) |
| Rev_flag = 0xb; |
| else |
| Rev_flag = 0; |
| } else if (cpu_id.family_id == MESON_CPU_MAJOR_ID_SM1) { |
| Rev_flag = MESON_CPU_MAJOR_ID_SM1; |
| } else if (cpu_id.family_id == MESON_CPU_MAJOR_ID_A1) { |
| Rev_flag = MESON_CPU_MAJOR_ID_A1; |
| } else if (cpu_id.family_id == MESON_CPU_MAJOR_ID_C1) { |
| Rev_flag = MESON_CPU_MAJOR_ID_C1; |
| } |
| return; |
| } |
| |
| static int phy_aml_usb2_get_rev_type (void) |
| { |
| int val = 0; |
| |
| switch (Rev_flag) { |
| case MESON_CPU_MAJOR_ID_SM1: |
| case MESON_CPU_MAJOR_ID_A1: |
| case MESON_CPU_MAJOR_ID_C1: |
| case 0xb: |
| val = 1; |
| break; |
| default: |
| printk("amlogic usb phy need tuning\n"); |
| val = 0; |
| break; |
| } |
| |
| return val; |
| } |
| |
| int get_usbphy_baseinfo(struct phy *usb_phys) |
| { |
| struct udevice *bus; |
| struct uclass *uc; |
| int ret, i; |
| unsigned int count; |
| |
| if (usb_phys[0].dev && usb_phys[1].dev) |
| return 0; |
| |
| ret = uclass_get(UCLASS_USB, &uc); |
| if (ret) |
| return ret; |
| uclass_foreach_dev(bus, uc) { |
| debug("bus->name=%s, bus->driver->name =%s\n", |
| bus->name, bus->driver->name); |
| count = dev_count_phandle_with_args(bus, "phys", "#phy-cells"); |
| debug("usb phy count=%u\n", count); |
| if (count <= 0) |
| return count; |
| for (i = 0; i < count; i++) { |
| ret = generic_phy_get_by_index(bus, i, &usb_phys[i]); |
| if (ret && ret != -ENOENT) { |
| pr_err("Failed to get USB PHY%d for %s\n", |
| i, bus->name); |
| return ret; |
| } |
| ret = generic_phy_getinfo(&usb_phys[i]); |
| if (ret) |
| return ret; |
| } |
| } |
| return 0; |
| } |
| |
| void usb_aml_detect_operation(int argc, char * const argv[]) |
| { |
| struct phy_aml_usb2_priv *usb2_priv; |
| struct phy_aml_usb3_priv *usb3_priv; |
| int ret; |
| |
| ret = get_usbphy_baseinfo(usb_phys); |
| if (ret) { |
| printf("get usb dts failed\n"); |
| return; |
| } |
| usb2_priv = dev_get_priv(usb_phys[0].dev); |
| usb3_priv = dev_get_priv(usb_phys[1].dev); |
| |
| if (usb3_priv) { |
| printf("priv->usb3 port num = %d, config addr=0x%08x\n", |
| usb3_priv->usb3_port_num, usb3_priv->base_addr); |
| } |
| if (usb2_priv) { |
| printf("usb2 phy: config addr = 0x%08x, reset addr=0x%08x\n", |
| usb2_priv->base_addr, usb2_priv->reset_addr); |
| |
| printf("usb2 phy: portnum=%d, phy-addr1= 0x%08x, phy-addr2= 0x%08x\n", |
| usb2_priv->u2_port_num, usb2_priv->usb_phy2_pll_base_addr[0], |
| usb2_priv->usb_phy2_pll_base_addr[1]); |
| printf("dwc2_a base addr: 0x%08x\n", usb2_priv->dwc2_a_addr); |
| } |
| phy_aml_usb2_check_rev(); |
| printf("PHY version is 0x%02x\n", Rev_flag); |
| } |
| |
| static void usb_set_power_domain (void) |
| { |
| int rev_type; |
| |
| rev_type = phy_aml_usb2_get_rev_type(); |
| if (rev_type ) { |
| writel((readl(P_AO_RTI_GEN_PWR_SLEEP0) & (~(0x1 << U2_CTRL_SLEEP_SHIFT))), |
| P_AO_RTI_GEN_PWR_SLEEP0); |
| writel((readl(P_AO_RTI_GEN_PWR_ISO0) & (~(0x1 << U2_CTRL_ISO_SHIFT))), |
| P_AO_RTI_GEN_PWR_ISO0); |
| writel((readl(P_HHI_MEM_PD_REG0) |
| & (~(U2_HHI_MEM_PD_MASK << U2_HHI_MEM_PD_SHIFT))), P_HHI_MEM_PD_REG0); |
| } |
| |
| return; |
| } |
| |
| static void set_pll_Calibration_default(uint32_t phy2_pll_base) |
| { |
| u32 tmp; |
| |
| tmp = (*(volatile uint32_t *)(unsigned long)((unsigned long)phy2_pll_base + 0x8)); |
| tmp &= 0xfff; |
| tmp |= (*(volatile uint32_t *)(unsigned long)((unsigned long)phy2_pll_base + 0x10)); |
| (*(volatile uint32_t *)(unsigned long)((unsigned long)phy2_pll_base + 0x10)) |
| = tmp; |
| } |
| |
| void usb_reset(unsigned int reset_addr, int bit){ |
| *(volatile unsigned int *)(unsigned long)reset_addr = (1 << bit); |
| } |
| |
| void set_usb_pll(uint32_t phy2_pll_base) |
| { |
| unsigned int pll_offset_48; |
| int hardware_rev; |
| |
| (*(volatile uint32_t *)((unsigned long)phy2_pll_base + 0x40)) |
| = (USB2_PHY_PLL_OFFSET_40 | USB_PHY2_RESET | USB_PHY2_ENABLE); |
| (*(volatile uint32_t *)((unsigned long)phy2_pll_base + 0x44)) = |
| USB2_PHY_PLL_OFFSET_44; |
| hardware_rev = phy_aml_usb2_get_rev_type(); |
| if (hardware_rev) |
| pll_offset_48 = USB2_SM1_PHY_PLL_OFFSET_48; |
| else |
| pll_offset_48 = USB2_PHY_PLL_OFFSET_48; |
| (*(volatile uint32_t *)((unsigned long)phy2_pll_base + 0x48)) = |
| pll_offset_48; |
| udelay(100); |
| (*(volatile uint32_t *)(unsigned long)((unsigned long)phy2_pll_base + 0x40)) |
| = (((USB2_PHY_PLL_OFFSET_40) | (USB_PHY2_ENABLE)) |
| & (~(USB_PHY2_RESET))); |
| if (hardware_rev) { |
| (*(volatile uint32_t *)(unsigned long)((unsigned long)phy2_pll_base + 0x50)) |
| = USB2_PHY_PLL_OFFSET_50; |
| (*(volatile uint32_t *)(unsigned long)((unsigned long)phy2_pll_base + 0x54)) |
| = USB2_PHY_PLL_OFFSET_54; |
| set_pll_Calibration_default(phy2_pll_base); |
| } else { |
| (*(volatile uint32_t *)(unsigned long)((unsigned long)phy2_pll_base + 0x50)) |
| = USB2_PHY_PLL_OFFSET_50; |
| (*(volatile uint32_t *)(unsigned long)((unsigned long)phy2_pll_base + 0x10)) |
| = USB2_PHY_PLL_OFFSET_10; |
| (*(volatile uint32_t *)(unsigned long)((unsigned long)phy2_pll_base + 0x38)) |
| = USB2_PHY_PLL_OFFSET_38_CLEAR; |
| } |
| |
| (*(volatile uint32_t *)((unsigned long)phy2_pll_base + 0xc)) = |
| TUNING_DISCONNECT_THRESHOLD; |
| (*(volatile uint32_t *)(unsigned long)((unsigned long)phy2_pll_base + 0x34)) |
| = USB2_PHY_PLL_OFFSET_34; |
| debug("tuning_disconnect_threshold=0x%x\n", TUNING_DISCONNECT_THRESHOLD); |
| } |
| |
| int usb_save_phy_dev (unsigned int number, struct phy *phy) |
| { |
| usb_phys[number].dev = phy->dev; |
| usb_phys[number].id = phy->id; |
| return 0; |
| } |
| |
| int usb2_phy_init (struct phy *phy) { |
| struct phy_aml_usb2_priv *priv = dev_get_priv(phy->dev); |
| struct u2p_aml_regs *u2p_aml_reg; |
| u2p_r0_t dev_u2p_r0; |
| u2p_r1_t dev_u2p_r1; |
| int i,cnt; |
| |
| usb_save_phy_dev(0, phy); |
| phy_aml_usb2_check_rev(); |
| usb_set_power_domain(); |
| |
| usb_reset(priv->reset_addr, USB_RESET_BIT); |
| |
| udelay(500); |
| priv->usbphy_reset_bit[0] = PHY20_RESET_LEVEL_BIT; |
| priv->usbphy_reset_bit[1] = PHY21_RESET_LEVEL_BIT; |
| |
| for (i = 0; i < priv->u2_port_num; i++) { |
| u2p_aml_reg = (struct u2p_aml_regs *)((ulong)(priv->base_addr + i * PHY_REGISTER_SIZE)); |
| dev_u2p_r0.d32 = u2p_aml_reg->u2p_r0; |
| dev_u2p_r0.b.host_device= 1; |
| dev_u2p_r0.b.POR= 0; |
| u2p_aml_reg->u2p_r0 = dev_u2p_r0.d32; |
| udelay(10); |
| /***USB PHY RESET : reset1 and reset1_level both need set ***/ |
| /***reset1: usb_reset ***/ |
| /***reset1_level: usb_enable_phy_pll ***/ |
| usb_reset(priv->reset_addr, priv->usbphy_reset_bit[i]); |
| udelay(50); |
| |
| /* wait for phy ready */ |
| dev_u2p_r1.d32 = u2p_aml_reg->u2p_r1; |
| cnt = 0; |
| while (dev_u2p_r1.b.phy_rdy != 1) { |
| dev_u2p_r1.d32 = u2p_aml_reg->u2p_r1; |
| /*we wait phy ready max 1ms, common is 100us*/ |
| if (cnt > 200) |
| break; |
| else { |
| cnt++; |
| udelay(5); |
| } |
| } |
| } |
| |
| for (i = 0; i < priv->u2_port_num; i++) { |
| debug("------set usb pll\n"); |
| set_usb_pll(priv->usb_phy2_pll_base_addr[i]); |
| } |
| return 0; |
| |
| } |
| |
| int usb2_phy_tuning(uint32_t phy2_pll_base, int port) |
| { |
| unsigned long phy_reg_base; |
| unsigned int pll_set38, pll_set34; |
| unsigned int rev_type = 0; |
| |
| if (port > 2) |
| return 0; |
| |
| pll_set38 = USB2_PHY_PLL_OFFSET_38_SET; |
| pll_set34 = USB2_PHY_PLL_OFFSET_34; |
| |
| debug("pll38=0x%08x, pll34=0x%08x,\n", |
| pll_set38, pll_set34); |
| |
| |
| phy_reg_base = phy2_pll_base; |
| |
| rev_type = phy_aml_usb2_get_rev_type(); |
| if (rev_type) { |
| return 0; |
| } |
| |
| (*(volatile uint32_t *)(phy_reg_base + 0x38)) = pll_set38; |
| (*(volatile uint32_t *)(phy_reg_base + 0x34)) = pll_set34; |
| return 0; |
| } |
| /**************************************************************/ |
| /* device mode config */ |
| /**************************************************************/ |
| unsigned int usb_get_dwc_a_base_addr(void) |
| { |
| struct phy_aml_usb2_priv *usb2_priv; |
| int ret; |
| |
| if (!usb_phys[0].dev) { |
| ret = get_usbphy_baseinfo(usb_phys); |
| if (ret) { |
| printf("get usb dts failed\n"); |
| return 0; |
| } |
| } |
| usb2_priv = dev_get_priv(usb_phys[0].dev); |
| return usb2_priv->dwc2_a_addr; |
| } |
| |
| unsigned int usb_get_device_mode_phy_base(void) |
| { |
| struct phy_aml_usb2_priv *usb2_priv; |
| int ret; |
| |
| if (!usb_phys[0].dev) { |
| ret = get_usbphy_baseinfo(usb_phys); |
| if (ret) { |
| printf("get usb dts failed\n"); |
| return 0; |
| } |
| } |
| usb2_priv = dev_get_priv(usb_phys[0].dev); |
| return usb2_priv->usb_phy2_pll_base_addr[1]; |
| } |
| |
| void usb_phy_tuning_reset(void) |
| { |
| unsigned long phy_reg_base = usb_get_device_mode_phy_base(); |
| int rev_type; |
| |
| rev_type = phy_aml_usb2_get_rev_type(); |
| |
| if (rev_type) |
| return; |
| if (phy_reg_base == 0) |
| return; |
| |
| (*(volatile uint32_t *)(phy_reg_base + 0x38)) = USB2_PHY_PLL_OFFSET_38_CLEAR; |
| (*(volatile uint32_t *)(phy_reg_base + 0x34)) = USB2_PHY_PLL_OFFSET_34; |
| } |
| |
| void usb_device_mode_init(void){ |
| u2p_r0_t dev_u2p_r0; |
| u2p_r1_t dev_u2p_r1; |
| |
| usb_r0_t dev_usb_r0; |
| usb_r4_t dev_usb_r4; |
| int cnt, ret; |
| u2p_aml_regs_t * u2p_aml_regs; |
| usb_aml_regs_t *usb_aml_regs; |
| struct phy_aml_usb2_priv *usb2_priv; |
| struct phy_aml_usb3_priv *usb3_priv; |
| unsigned int phy_base_addr, reset_addr; |
| |
| phy_aml_usb2_check_rev(); |
| ret = get_usbphy_baseinfo(usb_phys); |
| if (ret) { |
| printf("get usb dts failed\n"); |
| return; |
| } |
| usb2_priv = dev_get_priv(usb_phys[0].dev); |
| usb3_priv = dev_get_priv(usb_phys[1].dev); |
| if (!usb2_priv || !usb3_priv) { |
| printf("get usb phy address from dts failed\n"); |
| return; |
| } |
| |
| u2p_aml_regs = (u2p_aml_regs_t * )((ulong)(usb2_priv->base_addr + PHY_REGISTER_SIZE)); |
| usb_aml_regs = (usb_aml_regs_t * )((ulong)usb3_priv->base_addr); |
| phy_base_addr = usb2_priv->usb_phy2_pll_base_addr[1]; |
| reset_addr = usb2_priv->reset_addr; |
| |
| usb_set_power_domain(); |
| |
| printf("PHY2=0x%08lx,PHY3=0x%08lx\n", (ulong)u2p_aml_regs, (ulong)usb_aml_regs); |
| if ((*(volatile uint32_t *)((ulong)(phy_base_addr + 0x38))) != 0) { |
| usb_phy_tuning_reset(); |
| mdelay(150); |
| } |
| |
| //step 1: usb controller reset |
| usb_reset(reset_addr, USB_RESET_BIT); |
| |
| // step 3: enable usb INT internal USB |
| dev_usb_r0.d32 = usb_aml_regs->usb_r0; |
| dev_usb_r0.b.u2d_ss_scaledown_mode = 0; |
| dev_usb_r0.b.u2d_act = 1; |
| usb_aml_regs->usb_r0 = dev_usb_r0.d32; |
| |
| // step 4: disable usb phy sleep |
| dev_usb_r4.d32 = usb_aml_regs->usb_r4; |
| dev_usb_r4.b.p21_SLEEPM0 = 1; |
| usb_aml_regs->usb_r4 = dev_usb_r4.d32; |
| |
| // step 5: config phy21 device mode |
| dev_u2p_r0.d32 = u2p_aml_regs->u2p_r0; |
| dev_u2p_r0.b.host_device= 0; |
| dev_u2p_r0.b.POR= 0; |
| u2p_aml_regs->u2p_r0 = dev_u2p_r0.d32; |
| |
| udelay(10); |
| //step 6: phy21 reset |
| usb_reset(reset_addr, PHY21_RESET_LEVEL_BIT); |
| udelay(50); |
| |
| // step 6: wait for phy ready |
| dev_u2p_r1.d32 = u2p_aml_regs->u2p_r1; |
| cnt = 0; |
| while ((dev_u2p_r1.d32 & 0x00000001) != 1) { |
| dev_u2p_r1.d32 = u2p_aml_regs->u2p_r1; |
| if (cnt > 200) |
| break; |
| else { |
| cnt++; |
| udelay(5); |
| } |
| } |
| |
| set_usb_pll(phy_base_addr); |
| //-------------------------------------------------- |
| |
| // ------------- usb phy21 initinal end ---------- |
| |
| //-------------------------------------------------- |
| |
| } |
| |