arch/arm/mach-mv78xx0/common.c

   1 /*
   2  * arch/arm/mach-mv78xx0/common.c
   3  *
   4  * Core functions for Marvell MV78xx0 SoCs
   5  *
   6  * This file is licensed under the terms of the GNU General Public
   7  * License version 2.  This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/serial_8250.h>
  15 #include <linux/ata_platform.h>
  16 #include <linux/clk-provider.h>
  17 #include <linux/ethtool.h>
  18 #include <asm/hardware/cache-feroceon-l2.h>
  19 #include <asm/mach/map.h>
  20 #include <asm/mach/time.h>
  21 #include <linux/platform_data/usb-ehci-orion.h>
  22 #include <linux/platform_data/mtd-orion_nand.h>
  23 #include <plat/time.h>
  24 #include <plat/common.h>
  25 #include <plat/addr-map.h>
  26 #include "mv78xx0.h"
  27 #include "bridge-regs.h"
  28 #include "common.h"
  29
  30 static int get_tclk(void);
  31
  32 /*****************************************************************************
  33  * Common bits
  34  ****************************************************************************/
  35 int mv78xx0_core_index(void)
  36 {
  37         u32 extra;
  38
  39         /*
  40          * Read Extra Features register.
  41          */
  42         __asm__("mrc p15, 1, %0, c15, c1, 0" : "=r" (extra));
  43
  44         return !!(extra & 0x00004000);
  45 }
  46
  47 static int get_hclk(void)
  48 {
  49         int hclk;
  50
  51         /*
  52          * HCLK tick rate is configured by DEV_D[7:5] pins.
  53          */
  54         switch ((readl(SAMPLE_AT_RESET_LOW) >> 5) & 7) {
  55         case 0:
  56                 hclk = 166666667;
  57                 break;
  58         case 1:
  59                 hclk = 200000000;
  60                 break;
  61         case 2:
  62                 hclk = 266666667;
  63                 break;
  64         case 3:
  65                 hclk = 333333333;
  66                 break;
  67         case 4:
  68                 hclk = 400000000;
  69                 break;
  70         default:
  71                 panic("unknown HCLK PLL setting: %.8x\n",
  72                         readl(SAMPLE_AT_RESET_LOW));
  73         }
  74
  75         return hclk;
  76 }
  77
  78 static void get_pclk_l2clk(int hclk, int core_index, int *pclk, int *l2clk)
  79 {
  80         u32 cfg;
  81
  82         /*
  83          * Core #0 PCLK/L2CLK is configured by bits [13:8], core #1
  84          * PCLK/L2CLK by bits [19:14].
  85          */
  86         if (core_index == 0) {
  87                 cfg = (readl(SAMPLE_AT_RESET_LOW) >> 8) & 0x3f;
  88         } else {
  89                 cfg = (readl(SAMPLE_AT_RESET_LOW) >> 14) & 0x3f;
  90         }
  91
  92         /*
  93          * Bits [11:8] ([17:14] for core #1) configure the PCLK:HCLK
  94          * ratio (1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6).
  95          */
  96         *pclk = ((u64)hclk * (2 + (cfg & 0xf))) >> 1;
  97
  98         /*
  99          * Bits [13:12] ([19:18] for core #1) configure the PCLK:L2CLK
 100          * ratio (1, 2, 3).
 101          */
 102         *l2clk = *pclk / (((cfg >> 4) & 3) + 1);
 103 }
 104
 105 static int get_tclk(void)
 106 {
 107         int tclk_freq;
 108
 109         /*
 110          * TCLK tick rate is configured by DEV_A[2:0] strap pins.
 111          */
 112         switch ((readl(SAMPLE_AT_RESET_HIGH) >> 6) & 7) {
 113         case 1:
 114                 tclk_freq = 166666667;
 115                 break;
 116         case 3:
 117                 tclk_freq = 200000000;
 118                 break;
 119         default:
 120                 panic("unknown TCLK PLL setting: %.8x\n",
 121                         readl(SAMPLE_AT_RESET_HIGH));
 122         }
 123
 124         return tclk_freq;
 125 }
 126
 127
 128 /*****************************************************************************
 129  * I/O Address Mapping
 130  ****************************************************************************/
 131 static struct map_desc mv78xx0_io_desc[] __initdata = {
 132         {
 133                 .virtual        = (unsigned long) MV78XX0_CORE_REGS_VIRT_BASE,
 134                 .pfn            = 0,
 135                 .length         = MV78XX0_CORE_REGS_SIZE,
 136                 .type           = MT_DEVICE,
 137         }, {
 138                 .virtual        = (unsigned long) MV78XX0_REGS_VIRT_BASE,
 139                 .pfn            = __phys_to_pfn(MV78XX0_REGS_PHYS_BASE),
 140                 .length         = MV78XX0_REGS_SIZE,
 141                 .type           = MT_DEVICE,
 142         },
 143 };
 144
 145 void __init mv78xx0_map_io(void)
 146 {
 147         unsigned long phys;
 148
 149         /*
 150          * Map the right set of per-core registers depending on
 151          * which core we are running on.
 152          */
 153         if (mv78xx0_core_index() == 0) {
 154                 phys = MV78XX0_CORE0_REGS_PHYS_BASE;
 155         } else {
 156                 phys = MV78XX0_CORE1_REGS_PHYS_BASE;
 157         }
 158         mv78xx0_io_desc[0].pfn = __phys_to_pfn(phys);
 159
 160         iotable_init(mv78xx0_io_desc, ARRAY_SIZE(mv78xx0_io_desc));
 161 }
 162
 163
 164 /*****************************************************************************
 165  * CLK tree
 166  ****************************************************************************/
 167 static struct clk *tclk;
 168
 169 static void __init clk_init(void)
 170 {
 171         tclk = clk_register_fixed_rate(NULL, "tclk", NULL, 0, get_tclk());
 172
 173         orion_clkdev_init(tclk);
 174 }
 175
 176 /*****************************************************************************
 177  * EHCI
 178  ****************************************************************************/
 179 void __init mv78xx0_ehci0_init(void)
 180 {
 181         orion_ehci_init(USB0_PHYS_BASE, IRQ_MV78XX0_USB_0, EHCI_PHY_NA);
 182 }
 183
 184
 185 /*****************************************************************************
 186  * EHCI1
 187  ****************************************************************************/
 188 void __init mv78xx0_ehci1_init(void)
 189 {
 190         orion_ehci_1_init(USB1_PHYS_BASE, IRQ_MV78XX0_USB_1);
 191 }
 192
 193
 194 /*****************************************************************************
 195  * EHCI2
 196  ****************************************************************************/
 197 void __init mv78xx0_ehci2_init(void)
 198 {
 199         orion_ehci_2_init(USB2_PHYS_BASE, IRQ_MV78XX0_USB_2);
 200 }
 201
 202
 203 /*****************************************************************************
 204  * GE00
 205  ****************************************************************************/
 206 void __init mv78xx0_ge00_init(struct mv643xx_eth_platform_data *eth_data)
 207 {
 208         orion_ge00_init(eth_data,
 209                         GE00_PHYS_BASE, IRQ_MV78XX0_GE00_SUM,
 210                         IRQ_MV78XX0_GE_ERR,
 211                         MV643XX_TX_CSUM_DEFAULT_LIMIT);
 212 }
 213
 214
 215 /*****************************************************************************
 216  * GE01
 217  ****************************************************************************/
 218 void __init mv78xx0_ge01_init(struct mv643xx_eth_platform_data *eth_data)
 219 {
 220         orion_ge01_init(eth_data,
 221                         GE01_PHYS_BASE, IRQ_MV78XX0_GE01_SUM,
 222                         NO_IRQ,
 223                         MV643XX_TX_CSUM_DEFAULT_LIMIT);
 224 }
 225
 226
 227 /*****************************************************************************
 228  * GE10
 229  ****************************************************************************/
 230 void __init mv78xx0_ge10_init(struct mv643xx_eth_platform_data *eth_data)
 231 {
 232         u32 dev, rev;
 233
 234         /*
 235          * On the Z0, ge10 and ge11 are internally connected back
 236          * to back, and not brought out.
 237          */
 238         mv78xx0_pcie_id(&dev, &rev);
 239         if (dev == MV78X00_Z0_DEV_ID) {
 240                 eth_data->phy_addr = MV643XX_ETH_PHY_NONE;
 241                 eth_data->speed = SPEED_1000;
 242                 eth_data->duplex = DUPLEX_FULL;
 243         }
 244
 245         orion_ge10_init(eth_data,
 246                         GE10_PHYS_BASE, IRQ_MV78XX0_GE10_SUM,
 247                         NO_IRQ);
 248 }
 249
 250
 251 /*****************************************************************************
 252  * GE11
 253  ****************************************************************************/
 254 void __init mv78xx0_ge11_init(struct mv643xx_eth_platform_data *eth_data)
 255 {
 256         u32 dev, rev;
 257
 258         /*
 259          * On the Z0, ge10 and ge11 are internally connected back
 260          * to back, and not brought out.
 261          */
 262         mv78xx0_pcie_id(&dev, &rev);
 263         if (dev == MV78X00_Z0_DEV_ID) {
 264                 eth_data->phy_addr = MV643XX_ETH_PHY_NONE;
 265                 eth_data->speed = SPEED_1000;
 266                 eth_data->duplex = DUPLEX_FULL;
 267         }
 268
 269         orion_ge11_init(eth_data,
 270                         GE11_PHYS_BASE, IRQ_MV78XX0_GE11_SUM,
 271                         NO_IRQ);
 272 }
 273
 274 /*****************************************************************************
 275  * I2C
 276  ****************************************************************************/
 277 void __init mv78xx0_i2c_init(void)
 278 {
 279         orion_i2c_init(I2C_0_PHYS_BASE, IRQ_MV78XX0_I2C_0, 8);
 280         orion_i2c_1_init(I2C_1_PHYS_BASE, IRQ_MV78XX0_I2C_1, 8);
 281 }
 282
 283 /*****************************************************************************
 284  * SATA
 285  ****************************************************************************/
 286 void __init mv78xx0_sata_init(struct mv_sata_platform_data *sata_data)
 287 {
 288         orion_sata_init(sata_data, SATA_PHYS_BASE, IRQ_MV78XX0_SATA);
 289 }
 290
 291
 292 /*****************************************************************************
 293  * UART0
 294  ****************************************************************************/
 295 void __init mv78xx0_uart0_init(void)
 296 {
 297         orion_uart0_init(UART0_VIRT_BASE, UART0_PHYS_BASE,
 298                          IRQ_MV78XX0_UART_0, tclk);
 299 }
 300
 301
 302 /*****************************************************************************
 303  * UART1
 304  ****************************************************************************/
 305 void __init mv78xx0_uart1_init(void)
 306 {
 307         orion_uart1_init(UART1_VIRT_BASE, UART1_PHYS_BASE,
 308                          IRQ_MV78XX0_UART_1, tclk);
 309 }
 310
 311
 312 /*****************************************************************************
 313  * UART2
 314  ****************************************************************************/
 315 void __init mv78xx0_uart2_init(void)
 316 {
 317         orion_uart2_init(UART2_VIRT_BASE, UART2_PHYS_BASE,
 318                          IRQ_MV78XX0_UART_2, tclk);
 319 }
 320
 321 /*****************************************************************************
 322  * UART3
 323  ****************************************************************************/
 324 void __init mv78xx0_uart3_init(void)
 325 {
 326         orion_uart3_init(UART3_VIRT_BASE, UART3_PHYS_BASE,
 327                          IRQ_MV78XX0_UART_3, tclk);
 328 }
 329
 330 /*****************************************************************************
 331  * Time handling
 332  ****************************************************************************/
 333 void __init mv78xx0_init_early(void)
 334 {
 335         orion_time_set_base(TIMER_VIRT_BASE);
 336         if (mv78xx0_core_index() == 0)
 337                 mvebu_mbus_init("marvell,mv78xx0-mbus",
 338                                 BRIDGE_WINS_CPU0_BASE, BRIDGE_WINS_SZ,
 339                                 DDR_WINDOW_CPU0_BASE, DDR_WINDOW_CPU_SZ);
 340         else
 341                 mvebu_mbus_init("marvell,mv78xx0-mbus",
 342                                 BRIDGE_WINS_CPU1_BASE, BRIDGE_WINS_SZ,
 343                                 DDR_WINDOW_CPU1_BASE, DDR_WINDOW_CPU_SZ);
 344 }
 345
 346 void __init_refok mv78xx0_timer_init(void)
 347 {
 348         orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR,
 349                         IRQ_MV78XX0_TIMER_1, get_tclk());
 350 }
 351
 352
 353 /*****************************************************************************
 354  * General
 355  ****************************************************************************/
 356 static char * __init mv78xx0_id(void)
 357 {
 358         u32 dev, rev;
 359
 360         mv78xx0_pcie_id(&dev, &rev);
 361
 362         if (dev == MV78X00_Z0_DEV_ID) {
 363                 if (rev == MV78X00_REV_Z0)
 364                         return "MV78X00-Z0";
 365                 else
 366                         return "MV78X00-Rev-Unsupported";
 367         } else if (dev == MV78100_DEV_ID) {
 368                 if (rev == MV78100_REV_A0)
 369                         return "MV78100-A0";
 370                 else if (rev == MV78100_REV_A1)
 371                         return "MV78100-A1";
 372                 else
 373                         return "MV78100-Rev-Unsupported";
 374         } else if (dev == MV78200_DEV_ID) {
 375                 if (rev == MV78100_REV_A0)
 376                         return "MV78200-A0";
 377                 else
 378                         return "MV78200-Rev-Unsupported";
 379         } else {
 380                 return "Device-Unknown";
 381         }
 382 }
 383
 384 static int __init is_l2_writethrough(void)
 385 {
 386         return !!(readl(CPU_CONTROL) & L2_WRITETHROUGH);
 387 }
 388
 389 void __init mv78xx0_init(void)
 390 {
 391         int core_index;
 392         int hclk;
 393         int pclk;
 394         int l2clk;
 395
 396         core_index = mv78xx0_core_index();
 397         hclk = get_hclk();
 398         get_pclk_l2clk(hclk, core_index, &pclk, &l2clk);
 399
 400         printk(KERN_INFO "%s ", mv78xx0_id());
 401         printk("core #%d, ", core_index);
 402         printk("PCLK = %dMHz, ", (pclk + 499999) / 1000000);
 403         printk("L2 = %dMHz, ", (l2clk + 499999) / 1000000);
 404         printk("HCLK = %dMHz, ", (hclk + 499999) / 1000000);
 405         printk("TCLK = %dMHz\n", (get_tclk() + 499999) / 1000000);
 406
 407         if (IS_ENABLED(CONFIG_CACHE_FEROCEON_L2))
 408                 feroceon_l2_init(is_l2_writethrough());
 409
 410         /* Setup root of clk tree */
 411         clk_init();
 412 }
 413
 414 void mv78xx0_restart(enum reboot_mode mode, const char *cmd)
 415 {
 416         /*
 417          * Enable soft reset to assert RSTOUTn.
 418          */
 419         writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);
 420
 421         /*
 422          * Assert soft reset.
 423          */
 424         writel(SOFT_RESET, SYSTEM_SOFT_RESET);
 425
 426         while (1)
 427                 ;
 428 }