Tom Rini | 10e4779 | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
Mugunthan V N | 5b5479c | 2016-11-17 14:38:08 +0530 | [diff] [blame] | 2 | /* |
| 3 | * MISC driver for TI MUSB Glue. |
| 4 | * |
| 5 | * (C) Copyright 2016 |
| 6 | * Texas Instruments Incorporated, <www.ti.com> |
Mugunthan V N | 5b5479c | 2016-11-17 14:38:08 +0530 | [diff] [blame] | 7 | */ |
| 8 | #include <common.h> |
| 9 | #include <command.h> |
| 10 | #include <console.h> |
| 11 | #include <dm.h> |
| 12 | #include <linux/usb/otg.h> |
| 13 | #include <dm/device-internal.h> |
| 14 | #include <dm/lists.h> |
| 15 | |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 16 | #include <asm/io.h> |
| 17 | #include <asm/omap_musb.h> |
| 18 | #include "musb_uboot.h" |
| 19 | |
Mugunthan V N | 5b5479c | 2016-11-17 14:38:08 +0530 | [diff] [blame] | 20 | DECLARE_GLOBAL_DATA_PTR; |
| 21 | |
| 22 | #ifdef CONFIG_DM_USB |
| 23 | |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 24 | /* USB 2.0 PHY Control */ |
| 25 | #define CM_PHY_PWRDN (1 << 0) |
| 26 | #define CM_PHY_OTG_PWRDN (1 << 1) |
| 27 | #define OTGVDET_EN (1 << 19) |
| 28 | #define OTGSESSENDEN (1 << 20) |
| 29 | |
| 30 | #define AM335X_USB1_CTRL 0x8 |
| 31 | |
| 32 | struct ti_musb_platdata { |
| 33 | void *base; |
| 34 | void *ctrl_mod_base; |
| 35 | struct musb_hdrc_platform_data plat; |
| 36 | struct musb_hdrc_config musb_config; |
| 37 | struct omap_musb_board_data otg_board_data; |
| 38 | }; |
| 39 | |
| 40 | static int ti_musb_get_usb_index(int node) |
| 41 | { |
| 42 | const void *fdt = gd->fdt_blob; |
| 43 | int i = 0; |
| 44 | char path[64]; |
| 45 | const char *alias_path; |
| 46 | char alias[16]; |
| 47 | |
| 48 | fdt_get_path(fdt, node, path, sizeof(path)); |
| 49 | |
| 50 | do { |
| 51 | snprintf(alias, sizeof(alias), "usb%d", i); |
| 52 | alias_path = fdt_get_alias(fdt, alias); |
| 53 | if (alias_path == NULL) { |
| 54 | debug("USB index not found\n"); |
| 55 | return -ENOENT; |
| 56 | } |
| 57 | |
| 58 | if (!strcmp(path, alias_path)) |
| 59 | return i; |
| 60 | |
| 61 | i++; |
| 62 | } while (alias_path); |
| 63 | |
| 64 | return -ENOENT; |
| 65 | } |
| 66 | |
| 67 | static void ti_musb_set_phy_power(struct udevice *dev, u8 on) |
| 68 | { |
| 69 | struct ti_musb_platdata *platdata = dev_get_platdata(dev); |
| 70 | |
| 71 | if (on) { |
| 72 | clrsetbits_le32(platdata->ctrl_mod_base, |
| 73 | CM_PHY_PWRDN | CM_PHY_OTG_PWRDN, |
| 74 | OTGVDET_EN | OTGSESSENDEN); |
| 75 | } else { |
| 76 | clrsetbits_le32(platdata->ctrl_mod_base, 0, |
| 77 | CM_PHY_PWRDN | CM_PHY_OTG_PWRDN); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | static int ti_musb_ofdata_to_platdata(struct udevice *dev) |
| 82 | { |
| 83 | struct ti_musb_platdata *platdata = dev_get_platdata(dev); |
| 84 | const void *fdt = gd->fdt_blob; |
Simon Glass | dd79d6e | 2017-01-17 16:52:55 -0700 | [diff] [blame] | 85 | int node = dev_of_offset(dev); |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 86 | int phys; |
| 87 | int ctrl_mod; |
| 88 | int usb_index; |
| 89 | |
Simon Glass | ba1dea4 | 2017-05-17 17:18:05 -0600 | [diff] [blame] | 90 | platdata->base = (void *)devfdt_get_addr_index(dev, 1); |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 91 | |
| 92 | phys = fdtdec_lookup_phandle(fdt, node, "phys"); |
| 93 | ctrl_mod = fdtdec_lookup_phandle(fdt, phys, "ti,ctrl_mod"); |
| 94 | platdata->ctrl_mod_base = (void *)fdtdec_get_addr(fdt, ctrl_mod, "reg"); |
| 95 | usb_index = ti_musb_get_usb_index(node); |
| 96 | switch (usb_index) { |
| 97 | case 1: |
| 98 | platdata->ctrl_mod_base += AM335X_USB1_CTRL; |
| 99 | case 0: |
| 100 | default: |
| 101 | break; |
| 102 | } |
| 103 | |
| 104 | platdata->musb_config.multipoint = fdtdec_get_int(fdt, node, |
| 105 | "mentor,multipoint", |
| 106 | -1); |
| 107 | if (platdata->musb_config.multipoint < 0) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 108 | pr_err("MUSB multipoint DT entry missing\n"); |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 109 | return -ENOENT; |
| 110 | } |
| 111 | |
| 112 | platdata->musb_config.dyn_fifo = 1; |
| 113 | |
| 114 | platdata->musb_config.num_eps = fdtdec_get_int(fdt, node, |
| 115 | "mentor,num-eps", -1); |
| 116 | if (platdata->musb_config.num_eps < 0) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 117 | pr_err("MUSB num-eps DT entry missing\n"); |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 118 | return -ENOENT; |
| 119 | } |
| 120 | |
| 121 | platdata->musb_config.ram_bits = fdtdec_get_int(fdt, node, |
| 122 | "mentor,ram-bits", -1); |
| 123 | if (platdata->musb_config.ram_bits < 0) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 124 | pr_err("MUSB ram-bits DT entry missing\n"); |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 125 | return -ENOENT; |
| 126 | } |
| 127 | |
| 128 | platdata->otg_board_data.set_phy_power = ti_musb_set_phy_power; |
| 129 | platdata->otg_board_data.dev = dev; |
| 130 | platdata->plat.config = &platdata->musb_config; |
| 131 | |
| 132 | platdata->plat.power = fdtdec_get_int(fdt, node, "mentor,power", -1); |
| 133 | if (platdata->plat.power < 0) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 134 | pr_err("MUSB mentor,power DT entry missing\n"); |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 135 | return -ENOENT; |
| 136 | } |
| 137 | |
| 138 | platdata->plat.platform_ops = &musb_dsps_ops; |
| 139 | platdata->plat.board_data = &platdata->otg_board_data; |
| 140 | |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | static int ti_musb_host_probe(struct udevice *dev) |
| 145 | { |
| 146 | struct musb_host_data *host = dev_get_priv(dev); |
| 147 | struct ti_musb_platdata *platdata = dev_get_platdata(dev); |
| 148 | struct usb_bus_priv *priv = dev_get_uclass_priv(dev); |
| 149 | struct omap_musb_board_data *otg_board_data; |
| 150 | int ret; |
| 151 | |
| 152 | priv->desc_before_addr = true; |
| 153 | |
| 154 | otg_board_data = &platdata->otg_board_data; |
| 155 | |
| 156 | host->host = musb_init_controller(&platdata->plat, |
| 157 | (struct device *)otg_board_data, |
| 158 | platdata->base); |
| 159 | if (!host->host) |
| 160 | return -EIO; |
| 161 | |
| 162 | ret = musb_lowlevel_init(host); |
| 163 | |
| 164 | return ret; |
| 165 | } |
| 166 | |
| 167 | static int ti_musb_host_remove(struct udevice *dev) |
| 168 | { |
| 169 | struct musb_host_data *host = dev_get_priv(dev); |
| 170 | |
| 171 | musb_stop(host->host); |
| 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | static int ti_musb_host_ofdata_to_platdata(struct udevice *dev) |
| 177 | { |
| 178 | struct ti_musb_platdata *platdata = dev_get_platdata(dev); |
| 179 | const void *fdt = gd->fdt_blob; |
Simon Glass | dd79d6e | 2017-01-17 16:52:55 -0700 | [diff] [blame] | 180 | int node = dev_of_offset(dev); |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 181 | int ret; |
| 182 | |
| 183 | ret = ti_musb_ofdata_to_platdata(dev); |
| 184 | if (ret) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 185 | pr_err("platdata dt parse error\n"); |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | platdata->plat.mode = MUSB_HOST; |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | U_BOOT_DRIVER(ti_musb_host) = { |
| 195 | .name = "ti-musb-host", |
| 196 | .id = UCLASS_USB, |
| 197 | .ofdata_to_platdata = ti_musb_host_ofdata_to_platdata, |
| 198 | .probe = ti_musb_host_probe, |
| 199 | .remove = ti_musb_host_remove, |
| 200 | .ops = &musb_usb_ops, |
| 201 | .platdata_auto_alloc_size = sizeof(struct ti_musb_platdata), |
| 202 | .priv_auto_alloc_size = sizeof(struct musb_host_data), |
| 203 | }; |
| 204 | |
Mugunthan V N | 5b5479c | 2016-11-17 14:38:08 +0530 | [diff] [blame] | 205 | static int ti_musb_wrapper_bind(struct udevice *parent) |
| 206 | { |
| 207 | const void *fdt = gd->fdt_blob; |
| 208 | int node; |
| 209 | int ret; |
| 210 | |
Simon Glass | dd79d6e | 2017-01-17 16:52:55 -0700 | [diff] [blame] | 211 | for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0; |
Mugunthan V N | 5b5479c | 2016-11-17 14:38:08 +0530 | [diff] [blame] | 212 | node = fdt_next_subnode(fdt, node)) { |
| 213 | struct udevice *dev; |
| 214 | const char *name = fdt_get_name(fdt, node, NULL); |
| 215 | enum usb_dr_mode dr_mode; |
| 216 | struct driver *drv; |
| 217 | |
| 218 | if (strncmp(name, "usb@", 4)) |
| 219 | continue; |
| 220 | |
| 221 | dr_mode = usb_get_dr_mode(node); |
| 222 | switch (dr_mode) { |
| 223 | case USB_DR_MODE_PERIPHERAL: |
| 224 | /* Bind MUSB device */ |
| 225 | break; |
| 226 | case USB_DR_MODE_HOST: |
| 227 | /* Bind MUSB host */ |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 228 | ret = device_bind_driver_to_node(parent, "ti-musb-host", |
Simon Glass | e6dd8da | 2017-05-18 20:09:07 -0600 | [diff] [blame] | 229 | name, offset_to_ofnode(node), &dev); |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 230 | if (ret) { |
Masahiro Yamada | 81e1042 | 2017-09-16 14:10:41 +0900 | [diff] [blame] | 231 | pr_err("musb - not able to bind usb host node\n"); |
Mugunthan V N | 2d6f8c0 | 2016-11-17 14:38:11 +0530 | [diff] [blame] | 232 | return ret; |
| 233 | } |
Mugunthan V N | 5b5479c | 2016-11-17 14:38:08 +0530 | [diff] [blame] | 234 | break; |
| 235 | default: |
| 236 | break; |
| 237 | }; |
| 238 | } |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | static const struct udevice_id ti_musb_ids[] = { |
| 243 | { .compatible = "ti,am33xx-usb" }, |
| 244 | { } |
| 245 | }; |
| 246 | |
| 247 | U_BOOT_DRIVER(ti_musb_wrapper) = { |
| 248 | .name = "ti-musb-wrapper", |
| 249 | .id = UCLASS_MISC, |
| 250 | .of_match = ti_musb_ids, |
| 251 | .bind = ti_musb_wrapper_bind, |
| 252 | }; |
| 253 | |
| 254 | #endif /* CONFIG_DM_USB */ |