target/linux/lantiq/files/arch/mips/lantiq/svip/devices.c

   1 #include <linux/init.h>
   2 #include <linux/module.h>
   3 #include <linux/types.h>
   4 #include <linux/string.h>
   5 #include <linux/mtd/physmap.h>
   6 #include <linux/kernel.h>
   7 #include <linux/reboot.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/leds.h>
  10 #include <linux/etherdevice.h>
  11 #include <linux/reboot.h>
  12 #include <linux/time.h>
  13 #include <linux/io.h>
  14 #include <linux/gpio.h>
  15 #include <linux/leds.h>
  16 #include <linux/spi/spi.h>
  17 #include <linux/mtd/nand.h>
  18
  19 #include <asm/bootinfo.h>
  20 #include <asm/irq.h>
  21
  22 #include <lantiq.h>
  23
  24 #include <base_reg.h>
  25 #include <sys1_reg.h>
  26 #include <sys2_reg.h>
  27 #include <ebu_reg.h>
  28
  29 #include "devices.h"
  30
  31 #include <lantiq_soc.h>
  32 #include <svip_mux.h>
  33 #include <svip_pms.h>
  34
  35 /* ASC */
  36 void __init svip_register_asc(int port)
  37 {
  38         switch (port) {
  39         case 0:
  40                 ltq_register_asc(0);
  41                 svip_sys1_clk_enable(SYS1_CLKENR_ASC0);
  42                 break;
  43         case 1:
  44                 ltq_register_asc(1);
  45                 svip_sys1_clk_enable(SYS1_CLKENR_ASC1);
  46                 break;
  47         default:
  48                 break;
  49         };
  50 }
  51
  52 /* Ethernet */
  53 static unsigned char svip_ethaddr[6] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
  54
  55 static struct platform_device ltq_mii = {
  56         .name = "ifxmips_mii0",
  57         .dev = {
  58                 .platform_data = svip_ethaddr,
  59         },
  60 };
  61
  62 static int __init svip_set_ethaddr(char *str)
  63 {
  64         sscanf(str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
  65                &svip_ethaddr[0], &svip_ethaddr[1], &svip_ethaddr[2],
  66                &svip_ethaddr[3], &svip_ethaddr[4], &svip_ethaddr[5]);
  67         return 0;
  68 }
  69 __setup("ethaddr=", svip_set_ethaddr);
  70
  71 void __init svip_register_eth(void)
  72 {
  73         if (!is_valid_ether_addr(svip_ethaddr))
  74                 random_ether_addr(svip_ethaddr);
  75
  76         platform_device_register(&ltq_mii);
  77         svip_sys1_clk_enable(SYS1_CLKENR_ETHSW);
  78 }
  79
  80 /* Virtual Ethernet */
  81 static struct platform_device ltq_ve = {
  82         .name = "ifxmips_svip_ve",
  83 };
  84
  85 void __init svip_register_virtual_eth(void)
  86 {
  87         platform_device_register(&ltq_ve);
  88 }
  89
  90 /* SPI */
  91 static void __init ltq_register_ssc(int bus_num, unsigned long base, int irq_rx,
  92                                      int irq_tx, int irq_err, int irq_frm)
  93 {
  94         struct resource res[] = {
  95                 {
  96                         .name   = "regs",
  97                         .start  = base,
  98                         .end    = base + 0x20 - 1,
  99                         .flags  = IORESOURCE_MEM,
 100                 }, {
 101                         .name   = "rx",
 102                         .start  = irq_rx,
 103                         .flags  = IORESOURCE_IRQ,
 104                 }, {
 105                         .name   = "tx",
 106                         .start  = irq_tx,
 107                         .flags  = IORESOURCE_IRQ,
 108                 }, {
 109                         .name   = "err",
 110                         .start  = irq_err,
 111                         .flags  = IORESOURCE_IRQ,
 112                 }, {
 113                         .name   = "frm",
 114                         .start  = irq_frm,
 115                         .flags  = IORESOURCE_IRQ,
 116                 },
 117         };
 118
 119         platform_device_register_simple("ifx_ssc", bus_num, res,
 120                                         ARRAY_SIZE(res));
 121 }
 122
 123 static struct spi_board_info bdinfo[] __initdata = {
 124         {
 125                 .modalias = "xt16",
 126                 .mode = SPI_MODE_3,
 127                 .irq = INT_NUM_IM5_IRL0 + 28,
 128                 .max_speed_hz = 1000000,
 129                 .bus_num = 0,
 130                 .chip_select = 1,
 131         },
 132         {
 133                 .modalias = "xt16",
 134                 .mode = SPI_MODE_3,
 135                 .irq = INT_NUM_IM5_IRL0 + 19,
 136                 .max_speed_hz = 1000000,
 137                 .bus_num = 0,
 138                 .chip_select = 2,
 139         },
 140         {
 141                 .modalias = "loop",
 142                 .mode = SPI_MODE_0 | SPI_LOOP,
 143                 .irq = -1,
 144                 .max_speed_hz = 10000000,
 145                 .bus_num = 0,
 146                 .chip_select = 3,
 147         },
 148 };
 149
 150 void __init svip_register_spi(void)
 151 {
 152
 153         ltq_register_ssc(0, LTQ_SSC0_BASE, INT_NUM_IM1_IRL0 + 6,
 154                           INT_NUM_IM1_IRL0 + 7, INT_NUM_IM1_IRL0 + 8,
 155                           INT_NUM_IM1_IRL0 + 9);
 156
 157         ltq_register_ssc(1, LTQ_SSC1_BASE, INT_NUM_IM1_IRL0 + 10,
 158                           INT_NUM_IM1_IRL0 + 11, INT_NUM_IM1_IRL0 + 12,
 159                           INT_NUM_IM1_IRL0 + 13);
 160
 161         spi_register_board_info(bdinfo, ARRAY_SIZE(bdinfo));
 162
 163         svip_sys1_clk_enable(SYS1_CLKENR_SSC0 | SYS1_CLKENR_SSC1);
 164 }
 165
 166 void __init svip_register_spi_flash(struct spi_board_info *bdinfo)
 167 {
 168         spi_register_board_info(bdinfo, 1);
 169 }
 170
 171 /* GPIO */
 172 static struct platform_device ltq_gpio = {
 173         .name = "ifxmips_gpio",
 174 };
 175
 176 void __init svip_register_gpio(void)
 177 {
 178         platform_device_register(&ltq_gpio);
 179 }
 180
 181 /* MUX */
 182 static struct ltq_mux_settings ltq_mux_settings;
 183
 184 static struct platform_device ltq_mux = {
 185         .name = "ltq_mux",
 186         .dev = {
 187                 .platform_data = &ltq_mux_settings,
 188         }
 189 };
 190
 191 void __init svip_register_mux(const struct ltq_mux_pin mux_p0[LTQ_MUX_P0_PINS],
 192                               const struct ltq_mux_pin mux_p1[LTQ_MUX_P1_PINS],
 193                               const struct ltq_mux_pin mux_p2[LTQ_MUX_P2_PINS],
 194                               const struct ltq_mux_pin mux_p3[LTQ_MUX_P3_PINS],
 195                               const struct ltq_mux_pin mux_p4[LTQ_MUX_P4_PINS])
 196 {
 197         ltq_mux_settings.mux_p0 = mux_p0;
 198         ltq_mux_settings.mux_p1 = mux_p1;
 199         ltq_mux_settings.mux_p2 = mux_p2;
 200         ltq_mux_settings.mux_p3 = mux_p3;
 201         ltq_mux_settings.mux_p4 = mux_p4;
 202
 203         if (mux_p0)
 204                 svip_sys1_clk_enable(SYS1_CLKENR_PORT0);
 205
 206         if (mux_p1)
 207                 svip_sys1_clk_enable(SYS1_CLKENR_PORT1);
 208
 209         if (mux_p2)
 210                 svip_sys1_clk_enable(SYS1_CLKENR_PORT2);
 211
 212         if (mux_p3)
 213                 svip_sys1_clk_enable(SYS1_CLKENR_PORT3);
 214
 215         if (mux_p4)
 216                 svip_sys2_clk_enable(SYS2_CLKENR_PORT4);
 217
 218         platform_device_register(&ltq_mux);
 219 }
 220
 221 /* NAND */
 222 #define NAND_ADDR_REGION_BASE           (LTQ_EBU_SEG1_BASE)
 223 #define NAND_CLE_BIT                    (1 << 3)
 224 #define NAND_ALE_BIT                    (1 << 2)
 225
 226 static struct svip_reg_ebu *const ebu = (struct svip_reg_ebu *)LTQ_EBU_BASE;
 227
 228 static int svip_nand_probe(struct platform_device *pdev)
 229 {
 230         ebu_w32(LTQ_EBU_ADDR_SEL_0_BASE_VAL(CPHYSADDR(NAND_ADDR_REGION_BASE)
 231                                             >> 12)
 232                 | LTQ_EBU_ADDR_SEL_0_MASK_VAL(15)
 233                 | LTQ_EBU_ADDR_SEL_0_MRME_VAL(0)
 234                 | LTQ_EBU_ADDR_SEL_0_REGEN_VAL(1),
 235                 addr_sel_0);
 236
 237         ebu_w32(LTQ_EBU_CON_0_WRDIS_VAL(0)
 238                 | LTQ_EBU_CON_0_ADSWP_VAL(1)
 239                 | LTQ_EBU_CON_0_AGEN_VAL(0x00)
 240                 | LTQ_EBU_CON_0_SETUP_VAL(1)
 241                 | LTQ_EBU_CON_0_WAIT_VAL(0x00)
 242                 | LTQ_EBU_CON_0_WINV_VAL(0)
 243                 | LTQ_EBU_CON_0_PW_VAL(0x00)
 244                 | LTQ_EBU_CON_0_ALEC_VAL(0)
 245                 | LTQ_EBU_CON_0_BCGEN_VAL(0x01)
 246                 | LTQ_EBU_CON_0_WAITWRC_VAL(1)
 247                 | LTQ_EBU_CON_0_WAITRDC_VAL(1)
 248                 | LTQ_EBU_CON_0_HOLDC_VAL(1)
 249                 | LTQ_EBU_CON_0_RECOVC_VAL(0)
 250                 | LTQ_EBU_CON_0_CMULT_VAL(0x01),
 251                 con_0);
 252
 253         /*
 254          * ECC disabled
 255          * CLE, ALE and CS are pulse, all other signal are latches based
 256          * CLE and ALE are active high, PRE, WP, SE and CS/CE are active low
 257          * OUT_CS_S is disabled
 258          * NAND mode is disabled
 259          */
 260         ebu_w32(LTQ_EBU_NAND_CON_ECC_ON_VAL(0)
 261                 | LTQ_EBU_NAND_CON_LAT_EN_VAL(0x38)
 262                 | LTQ_EBU_NAND_CON_OUT_CS_S_VAL(0)
 263                 | LTQ_EBU_NAND_CON_IN_CS_S_VAL(0)
 264                 | LTQ_EBU_NAND_CON_PRE_P_VAL(1)
 265                 | LTQ_EBU_NAND_CON_WP_P_VAL(1)
 266                 | LTQ_EBU_NAND_CON_SE_P_VAL(1)
 267                 | LTQ_EBU_NAND_CON_CS_P_VAL(1)
 268                 | LTQ_EBU_NAND_CON_CLE_P_VAL(0)
 269                 | LTQ_EBU_NAND_CON_ALE_P_VAL(0)
 270                 | LTQ_EBU_NAND_CON_CSMUX_E_VAL(0)
 271                 | LTQ_EBU_NAND_CON_NANDMODE_VAL(0),
 272                 nand_con);
 273
 274         return 0;
 275 }
 276
 277 static void svip_nand_hwcontrol(struct mtd_info *mtd, int cmd,
 278                                 unsigned int ctrl)
 279 {
 280         struct nand_chip *this = mtd->priv;
 281
 282         if (ctrl & NAND_CTRL_CHANGE) {
 283                 unsigned long adr;
 284                 /* Coming here means to change either the enable state or
 285                  * the address for controlling ALE or CLE */
 286
 287                 /* NAND_NCE: Select the chip by setting nCE to low.
 288                  * This is done in CON register */
 289                 if (ctrl & NAND_NCE)
 290                         ebu_w32_mask(0, LTQ_EBU_NAND_CON_NANDMODE_VAL(1),
 291                                      nand_con);
 292                 else
 293                         ebu_w32_mask(LTQ_EBU_NAND_CON_NANDMODE_VAL(1),
 294                                      0, nand_con);
 295
 296                 /* The addressing of CLE or ALE is done via different addresses.
 297                    We are now changing the address depending on the given action
 298                    SVIPs NAND_CLE_BIT = (1 << 3), NAND_CLE = 0x02
 299                    NAND_ALE_BIT = (1 << 2) = NAND_ALE (0x04) */
 300                 adr = (unsigned long)this->IO_ADDR_W;
 301                 adr &= ~(NAND_CLE_BIT | NAND_ALE_BIT);
 302                 adr |= (ctrl & NAND_CLE) << 2 | (ctrl & NAND_ALE);
 303                 this->IO_ADDR_W = (void __iomem *)adr;
 304         }
 305
 306         if (cmd != NAND_CMD_NONE)
 307                 writeb(cmd, this->IO_ADDR_W);
 308 }
 309
 310 static int svip_nand_ready(struct mtd_info *mtd)
 311 {
 312         return (ebu_r32(nand_wait) & 0x01) == 0x01;
 313 }
 314
 315 static inline void svip_nand_wait(void)
 316 {
 317         static const int nops = 150;
 318         int i;
 319
 320         for (i = 0; i < nops; i++)
 321                 asm("nop");
 322 }
 323
 324 static void svip_nand_write_buf(struct mtd_info *mtd,
 325                                 const u_char *buf, int len)
 326 {
 327         int i;
 328         struct nand_chip *this = mtd->priv;
 329
 330         for (i = 0; i < len; i++) {
 331                 writeb(buf[i], this->IO_ADDR_W);
 332                 svip_nand_wait();
 333         }
 334 }
 335
 336 static void svip_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
 337 {
 338         int i;
 339         struct nand_chip *this = mtd->priv;
 340
 341         for (i = 0; i < len; i++) {
 342                 buf[i] = readb(this->IO_ADDR_R);
 343                 svip_nand_wait();
 344         }
 345 }
 346
 347 static const char *part_probes[] = { "cmdlinepart", NULL };
 348
 349 static struct platform_nand_data svip_flash_nand_data = {
 350         .chip = {
 351                 .nr_chips               = 1,
 352                 .part_probe_types       = part_probes,
 353         },
 354         .ctrl = {
 355                 .probe                  = svip_nand_probe,
 356                 .cmd_ctrl               = svip_nand_hwcontrol,
 357                 .dev_ready              = svip_nand_ready,
 358                 .write_buf              = svip_nand_write_buf,
 359                 .read_buf               = svip_nand_read_buf,
 360         }
 361 };
 362
 363 static struct resource svip_nand_resources[] = {
 364         MEM_RES("nand", LTQ_FLASH_START, LTQ_FLASH_MAX),
 365 };
 366
 367 static struct platform_device svip_flash_nand = {
 368         .name           = "gen_nand",
 369         .id             = -1,
 370         .num_resources  = ARRAY_SIZE(svip_nand_resources),
 371         .resource       = svip_nand_resources,
 372         .dev            = {
 373                 .platform_data = &svip_flash_nand_data,
 374         },
 375 };
 376
 377 void __init svip_register_nand(void)
 378 {
 379         platform_device_register(&svip_flash_nand);
 380 }