Valentin Longchamp | 2ebd150 | 2012-08-16 01:17:26 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2012 |
| 3 | * Valentin Lontgchamp, Keymile AG, valentin.longchamp@keymile.com |
| 4 | * |
Wolfgang Denk | d79de1d | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 5 | * SPDX-License-Identifier: GPL-2.0+ |
Valentin Longchamp | 2ebd150 | 2012-08-16 01:17:26 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #include <common.h> |
| 9 | #include <miiphy.h> |
Masahiro Yamada | 56a931c | 2016-09-21 11:28:55 +0900 | [diff] [blame] | 10 | #include <linux/errno.h> |
Valentin Longchamp | 2ebd150 | 2012-08-16 01:17:26 +0000 | [diff] [blame] | 11 | #include <mv88e6352.h> |
| 12 | |
| 13 | #define SMI_HDR ((0x8 | 0x1) << 12) |
| 14 | #define SMI_BUSY_MASK (0x8000) |
| 15 | #define SMIRD_OP (0x2 << 10) |
| 16 | #define SMIWR_OP (0x1 << 10) |
| 17 | #define SMI_MASK 0x1f |
| 18 | #define PORT_SHIFT 5 |
| 19 | |
| 20 | #define COMMAND_REG 0 |
| 21 | #define DATA_REG 1 |
| 22 | |
| 23 | /* global registers */ |
| 24 | #define GLOBAL 0x1b |
| 25 | |
| 26 | #define GLOBAL_STATUS 0x00 |
| 27 | #define PPU_STATE 0x8000 |
| 28 | |
| 29 | #define GLOBAL_CTRL 0x04 |
| 30 | #define SW_RESET 0x8000 |
| 31 | #define PPU_ENABLE 0x4000 |
| 32 | |
| 33 | static int sw_wait_rdy(const char *devname, u8 phy_addr) |
| 34 | { |
| 35 | u16 command; |
| 36 | u32 timeout = 100; |
| 37 | int ret; |
| 38 | |
| 39 | /* wait till the SMI is not busy */ |
| 40 | do { |
| 41 | /* read command register */ |
| 42 | ret = miiphy_read(devname, phy_addr, COMMAND_REG, &command); |
| 43 | if (ret < 0) { |
| 44 | printf("%s: Error reading command register\n", |
| 45 | __func__); |
| 46 | return ret; |
| 47 | } |
| 48 | if (timeout-- == 0) { |
| 49 | printf("Err..(%s) SMI busy timeout\n", __func__); |
| 50 | return -EFAULT; |
| 51 | } |
| 52 | } while (command & SMI_BUSY_MASK); |
| 53 | |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | static int sw_reg_read(const char *devname, u8 phy_addr, u8 port, |
| 58 | u8 reg, u16 *data) |
| 59 | { |
| 60 | int ret; |
| 61 | u16 command; |
| 62 | |
| 63 | ret = sw_wait_rdy(devname, phy_addr); |
| 64 | if (ret) |
| 65 | return ret; |
| 66 | |
| 67 | command = SMI_HDR | SMIRD_OP | ((port&SMI_MASK) << PORT_SHIFT) | |
| 68 | (reg & SMI_MASK); |
| 69 | debug("%s: write to command: %#x\n", __func__, command); |
| 70 | ret = miiphy_write(devname, phy_addr, COMMAND_REG, command); |
| 71 | if (ret) |
| 72 | return ret; |
| 73 | |
| 74 | ret = sw_wait_rdy(devname, phy_addr); |
| 75 | if (ret) |
| 76 | return ret; |
| 77 | |
| 78 | ret = miiphy_read(devname, phy_addr, DATA_REG, data); |
| 79 | |
| 80 | return ret; |
| 81 | } |
| 82 | |
| 83 | static int sw_reg_write(const char *devname, u8 phy_addr, u8 port, |
| 84 | u8 reg, u16 data) |
| 85 | { |
| 86 | int ret; |
| 87 | u16 value; |
| 88 | |
| 89 | ret = sw_wait_rdy(devname, phy_addr); |
| 90 | if (ret) |
| 91 | return ret; |
| 92 | |
| 93 | debug("%s: write to data: %#x\n", __func__, data); |
| 94 | ret = miiphy_write(devname, phy_addr, DATA_REG, data); |
| 95 | if (ret) |
| 96 | return ret; |
| 97 | |
| 98 | value = SMI_HDR | SMIWR_OP | ((port & SMI_MASK) << PORT_SHIFT) | |
| 99 | (reg & SMI_MASK); |
| 100 | debug("%s: write to command: %#x\n", __func__, value); |
| 101 | ret = miiphy_write(devname, phy_addr, COMMAND_REG, value); |
| 102 | if (ret) |
| 103 | return ret; |
| 104 | |
| 105 | ret = sw_wait_rdy(devname, phy_addr); |
| 106 | if (ret) |
| 107 | return ret; |
| 108 | |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | static int ppu_enable(const char *devname, u8 phy_addr) |
| 113 | { |
| 114 | int i, ret = 0; |
| 115 | u16 reg; |
| 116 | |
| 117 | ret = sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_CTRL, ®); |
| 118 | if (ret) { |
| 119 | printf("%s: Error reading global ctrl reg\n", __func__); |
| 120 | return ret; |
| 121 | } |
| 122 | |
| 123 | reg |= PPU_ENABLE; |
| 124 | |
| 125 | ret = sw_reg_write(devname, phy_addr, GLOBAL, GLOBAL_CTRL, reg); |
| 126 | if (ret) { |
| 127 | printf("%s: Error writing global ctrl reg\n", __func__); |
| 128 | return ret; |
| 129 | } |
| 130 | |
| 131 | for (i = 0; i < 1000; i++) { |
| 132 | sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_STATUS, |
| 133 | ®); |
| 134 | if ((reg & 0xc000) == 0xc000) |
| 135 | return 0; |
| 136 | udelay(1000); |
| 137 | } |
| 138 | |
| 139 | return -ETIMEDOUT; |
| 140 | } |
| 141 | |
| 142 | static int ppu_disable(const char *devname, u8 phy_addr) |
| 143 | { |
| 144 | int i, ret = 0; |
| 145 | u16 reg; |
| 146 | |
| 147 | ret = sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_CTRL, ®); |
| 148 | if (ret) { |
| 149 | printf("%s: Error reading global ctrl reg\n", __func__); |
| 150 | return ret; |
| 151 | } |
| 152 | |
| 153 | reg &= ~PPU_ENABLE; |
| 154 | |
| 155 | ret = sw_reg_write(devname, phy_addr, GLOBAL, GLOBAL_CTRL, reg); |
| 156 | if (ret) { |
| 157 | printf("%s: Error writing global ctrl reg\n", __func__); |
| 158 | return ret; |
| 159 | } |
| 160 | |
| 161 | for (i = 0; i < 1000; i++) { |
| 162 | sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_STATUS, |
| 163 | ®); |
| 164 | if ((reg & 0xc000) != 0xc000) |
| 165 | return 0; |
| 166 | udelay(1000); |
| 167 | } |
| 168 | |
| 169 | return -ETIMEDOUT; |
| 170 | } |
| 171 | |
| 172 | int mv88e_sw_program(const char *devname, u8 phy_addr, |
| 173 | struct mv88e_sw_reg *regs, int regs_nb) |
| 174 | { |
| 175 | int i, ret = 0; |
| 176 | |
| 177 | /* first we need to disable the PPU */ |
| 178 | ret = ppu_disable(devname, phy_addr); |
| 179 | if (ret) { |
| 180 | printf("%s: Error disabling PPU\n", __func__); |
| 181 | return ret; |
| 182 | } |
| 183 | |
| 184 | for (i = 0; i < regs_nb; i++) { |
| 185 | ret = sw_reg_write(devname, phy_addr, regs[i].port, |
| 186 | regs[i].reg, regs[i].value); |
| 187 | if (ret) { |
| 188 | printf("%s: Error configuring switch\n", __func__); |
| 189 | ppu_enable(devname, phy_addr); |
| 190 | return ret; |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | /* re-enable the PPU */ |
| 195 | ret = ppu_enable(devname, phy_addr); |
| 196 | if (ret) { |
| 197 | printf("%s: Error enabling PPU\n", __func__); |
| 198 | return ret; |
| 199 | } |
| 200 | |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | int mv88e_sw_reset(const char *devname, u8 phy_addr) |
| 205 | { |
| 206 | int i, ret = 0; |
| 207 | u16 reg; |
| 208 | |
| 209 | ret = sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_CTRL, ®); |
| 210 | if (ret) { |
| 211 | printf("%s: Error reading global ctrl reg\n", __func__); |
| 212 | return ret; |
| 213 | } |
| 214 | |
| 215 | reg = SW_RESET | PPU_ENABLE | 0x0400; |
| 216 | |
| 217 | ret = sw_reg_write(devname, phy_addr, GLOBAL, GLOBAL_CTRL, reg); |
| 218 | if (ret) { |
| 219 | printf("%s: Error writing global ctrl reg\n", __func__); |
| 220 | return ret; |
| 221 | } |
| 222 | |
| 223 | for (i = 0; i < 1000; i++) { |
| 224 | sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_STATUS, |
| 225 | ®); |
| 226 | if ((reg & 0xc800) != 0xc800) |
| 227 | return 0; |
| 228 | udelay(1000); |
| 229 | } |
| 230 | |
| 231 | return -ETIMEDOUT; |
| 232 | } |
| 233 | |
| 234 | int do_mvsw_reg_read(const char *name, int argc, char * const argv[]) |
| 235 | { |
| 236 | u16 value = 0, phyaddr, reg, port; |
| 237 | int ret; |
| 238 | |
| 239 | phyaddr = simple_strtoul(argv[1], NULL, 10); |
| 240 | port = simple_strtoul(argv[2], NULL, 10); |
| 241 | reg = simple_strtoul(argv[3], NULL, 10); |
| 242 | |
| 243 | ret = sw_reg_read(name, phyaddr, port, reg, &value); |
| 244 | printf("%#x\n", value); |
| 245 | |
| 246 | return ret; |
| 247 | } |
| 248 | |
| 249 | int do_mvsw_reg_write(const char *name, int argc, char * const argv[]) |
| 250 | { |
| 251 | u16 value = 0, phyaddr, reg, port; |
| 252 | int ret; |
| 253 | |
| 254 | phyaddr = simple_strtoul(argv[1], NULL, 10); |
| 255 | port = simple_strtoul(argv[2], NULL, 10); |
| 256 | reg = simple_strtoul(argv[3], NULL, 10); |
| 257 | value = simple_strtoul(argv[4], NULL, 16); |
| 258 | |
| 259 | ret = sw_reg_write(name, phyaddr, port, reg, value); |
| 260 | |
| 261 | return ret; |
| 262 | } |
| 263 | |
| 264 | |
| 265 | int do_mvsw_reg(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
| 266 | { |
| 267 | int ret; |
| 268 | const char *cmd, *ethname; |
| 269 | |
| 270 | if (argc < 2) |
| 271 | return cmd_usage(cmdtp); |
| 272 | |
| 273 | cmd = argv[1]; |
| 274 | --argc; |
| 275 | ++argv; |
| 276 | |
| 277 | if (strcmp(cmd, "read") == 0) { |
| 278 | if (argc < 5) |
| 279 | return cmd_usage(cmdtp); |
| 280 | ethname = argv[1]; |
| 281 | --argc; |
| 282 | ++argv; |
| 283 | ret = do_mvsw_reg_read(ethname, argc, argv); |
| 284 | } else if (strcmp(cmd, "write") == 0) { |
| 285 | if (argc < 6) |
| 286 | return cmd_usage(cmdtp); |
| 287 | ethname = argv[1]; |
| 288 | --argc; |
| 289 | ++argv; |
| 290 | ret = do_mvsw_reg_write(ethname, argc, argv); |
| 291 | } else |
| 292 | return cmd_usage(cmdtp); |
| 293 | |
| 294 | return ret; |
| 295 | } |
| 296 | |
| 297 | U_BOOT_CMD( |
| 298 | mvsw_reg, 7, 1, do_mvsw_reg, |
| 299 | "marvell 88e6352 switch register access", |
| 300 | "write ethname phyaddr port reg value\n" |
| 301 | "mvsw_reg read ethname phyaddr port reg\n" |
| 302 | ); |