arch/ppc/platforms/chrp_pegasos_eth.c

   1 /*
   2  *  Copyright (C) 2005 Sven Luther <sl@bplan-gmbh.de>
   3  *  Thanks to :
   4  *      Dale Farnsworth <dale@farnsworth.org>
   5  *      Mark A. Greer <mgreer@mvista.com>
   6  *      Nicolas DET <nd@bplan-gmbh.de>
   7  *      Benjamin Herrenschmidt <benh@kernel.crashing.org>
   8  *  And anyone else who helped me on this.
   9  */
  10
  11 #include <linux/types.h>
  12 #include <linux/init.h>
  13 #include <linux/ioport.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/mv643xx.h>
  16 #include <linux/pci.h>
  17
  18 #define PEGASOS2_MARVELL_REGBASE                (0xf1000000)
  19 #define PEGASOS2_MARVELL_REGSIZE                (0x00004000)
  20 #define PEGASOS2_SRAM_BASE                      (0xf2000000)
  21 #define PEGASOS2_SRAM_SIZE                      (256*1024)
  22
  23 #define PEGASOS2_SRAM_BASE_ETH0                 (PEGASOS2_SRAM_BASE)
  24 #define PEGASOS2_SRAM_BASE_ETH1                 (PEGASOS2_SRAM_BASE_ETH0 + (PEGASOS2_SRAM_SIZE / 2) )
  25
  26
  27 #define PEGASOS2_SRAM_RXRING_SIZE               (PEGASOS2_SRAM_SIZE/4)
  28 #define PEGASOS2_SRAM_TXRING_SIZE               (PEGASOS2_SRAM_SIZE/4)
  29
  30 #undef BE_VERBOSE
  31
  32 static struct resource mv643xx_eth_shared_resources[] = {
  33         [0] = {
  34                 .name   = "ethernet shared base",
  35                 .start  = 0xf1000000 + MV643XX_ETH_SHARED_REGS,
  36                 .end    = 0xf1000000 + MV643XX_ETH_SHARED_REGS +
  37                                         MV643XX_ETH_SHARED_REGS_SIZE - 1,
  38                 .flags  = IORESOURCE_MEM,
  39         },
  40 };
  41
  42 static struct platform_device mv643xx_eth_shared_device = {
  43         .name           = MV643XX_ETH_SHARED_NAME,
  44         .id             = 0,
  45         .num_resources  = ARRAY_SIZE(mv643xx_eth_shared_resources),
  46         .resource       = mv643xx_eth_shared_resources,
  47 };
  48
  49 static struct resource mv643xx_eth0_resources[] = {
  50         [0] = {
  51                 .name   = "eth0 irq",
  52                 .start  = 9,
  53                 .end    = 9,
  54                 .flags  = IORESOURCE_IRQ,
  55         },
  56 };
  57
  58
  59 static struct mv643xx_eth_platform_data eth0_pd = {
  60         .tx_sram_addr = PEGASOS2_SRAM_BASE_ETH0,
  61         .tx_sram_size = PEGASOS2_SRAM_TXRING_SIZE,
  62         .tx_queue_size = PEGASOS2_SRAM_TXRING_SIZE/16,
  63
  64         .rx_sram_addr = PEGASOS2_SRAM_BASE_ETH0 + PEGASOS2_SRAM_TXRING_SIZE,
  65         .rx_sram_size = PEGASOS2_SRAM_RXRING_SIZE,
  66         .rx_queue_size = PEGASOS2_SRAM_RXRING_SIZE/16,
  67 };
  68
  69 static struct platform_device eth0_device = {
  70         .name           = MV643XX_ETH_NAME,
  71         .id             = 0,
  72         .num_resources  = ARRAY_SIZE(mv643xx_eth0_resources),
  73         .resource       = mv643xx_eth0_resources,
  74         .dev = {
  75                 .platform_data = &eth0_pd,
  76         },
  77 };
  78
  79 static struct resource mv643xx_eth1_resources[] = {
  80         [0] = {
  81                 .name   = "eth1 irq",
  82                 .start  = 9,
  83                 .end    = 9,
  84                 .flags  = IORESOURCE_IRQ,
  85         },
  86 };
  87
  88 static struct mv643xx_eth_platform_data eth1_pd = {
  89         .tx_sram_addr = PEGASOS2_SRAM_BASE_ETH1,
  90         .tx_sram_size = PEGASOS2_SRAM_TXRING_SIZE,
  91         .tx_queue_size = PEGASOS2_SRAM_TXRING_SIZE/16,
  92
  93         .rx_sram_addr = PEGASOS2_SRAM_BASE_ETH1 + PEGASOS2_SRAM_TXRING_SIZE,
  94         .rx_sram_size = PEGASOS2_SRAM_RXRING_SIZE,
  95         .rx_queue_size = PEGASOS2_SRAM_RXRING_SIZE/16,
  96 };
  97
  98 static struct platform_device eth1_device = {
  99         .name           = MV643XX_ETH_NAME,
 100         .id             = 1,
 101         .num_resources  = ARRAY_SIZE(mv643xx_eth1_resources),
 102         .resource       = mv643xx_eth1_resources,
 103         .dev = {
 104                 .platform_data = &eth1_pd,
 105         },
 106 };
 107
 108 static struct platform_device *mv643xx_eth_pd_devs[] __initdata = {
 109         &mv643xx_eth_shared_device,
 110         &eth0_device,
 111         &eth1_device,
 112 };
 113
 114 /***********/
 115 /***********/
 116 #define MV_READ(offset,val)     { val = readl(mv643xx_reg_base + offset); }
 117 #define MV_WRITE(offset,data) writel(data, mv643xx_reg_base + offset)
 118
 119 static void __iomem *mv643xx_reg_base;
 120
 121 static int Enable_SRAM(void)
 122 {
 123         u32 ALong;
 124
 125         if (mv643xx_reg_base == NULL)
 126                 mv643xx_reg_base = ioremap(PEGASOS2_MARVELL_REGBASE,
 127                                         PEGASOS2_MARVELL_REGSIZE);
 128
 129         if (mv643xx_reg_base == NULL)
 130                 return -ENOMEM;
 131
 132 #ifdef BE_VERBOSE
 133         printk("Pegasos II/Marvell MV64361: register remapped from %p to %p\n",
 134                 (void *)PEGASOS2_MARVELL_REGBASE, (void *)mv643xx_reg_base);
 135 #endif
 136
 137         MV_WRITE(MV64340_SRAM_CONFIG, 0);
 138
 139         MV_WRITE(MV64340_INTEGRATED_SRAM_BASE_ADDR, PEGASOS2_SRAM_BASE >> 16);
 140
 141         MV_READ(MV64340_BASE_ADDR_ENABLE, ALong);
 142         ALong &= ~(1 << 19);
 143         MV_WRITE(MV64340_BASE_ADDR_ENABLE, ALong);
 144
 145         ALong = 0x02;
 146         ALong |= PEGASOS2_SRAM_BASE & 0xffff0000;
 147         MV_WRITE(MV643XX_ETH_BAR_4, ALong);
 148
 149         MV_WRITE(MV643XX_ETH_SIZE_REG_4, (PEGASOS2_SRAM_SIZE-1) & 0xffff0000);
 150
 151         MV_READ(MV643XX_ETH_BASE_ADDR_ENABLE_REG, ALong);
 152         ALong &= ~(1 << 4);
 153         MV_WRITE(MV643XX_ETH_BASE_ADDR_ENABLE_REG, ALong);
 154
 155 #ifdef BE_VERBOSE
 156         printk("Pegasos II/Marvell MV64361: register unmapped\n");
 157         printk("Pegasos II/Marvell MV64361: SRAM at %p, size=%x\n", (void*) PEGASOS2_SRAM_BASE, PEGASOS2_SRAM_SIZE);
 158 #endif
 159
 160         iounmap(mv643xx_reg_base);
 161         mv643xx_reg_base = NULL;
 162
 163         return 1;
 164 }
 165
 166
 167 /***********/
 168 /***********/
 169 int mv643xx_eth_add_pds(void)
 170 {
 171         int ret = 0;
 172         static struct pci_device_id pci_marvell_mv64360[] = {
 173                 { PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_MV64360) },
 174                 { }
 175         };
 176
 177 #ifdef BE_VERBOSE
 178         printk("Pegasos II/Marvell MV64361: init\n");
 179 #endif
 180
 181         if (pci_dev_present(pci_marvell_mv64360)) {
 182                 ret = platform_add_devices(mv643xx_eth_pd_devs,
 183                                 ARRAY_SIZE(mv643xx_eth_pd_devs));
 184
 185                 if ( Enable_SRAM() < 0)
 186                 {
 187                         eth0_pd.tx_sram_addr = 0;
 188                         eth0_pd.tx_sram_size = 0;
 189                         eth0_pd.rx_sram_addr = 0;
 190                         eth0_pd.rx_sram_size = 0;
 191
 192                         eth1_pd.tx_sram_addr = 0;
 193                         eth1_pd.tx_sram_size = 0;
 194                         eth1_pd.rx_sram_addr = 0;
 195                         eth1_pd.rx_sram_size = 0;
 196
 197 #ifdef BE_VERBOSE
 198                         printk("Pegasos II/Marvell MV64361: Can't enable the "
 199                                 "SRAM\n");
 200 #endif
 201                 }
 202         }
 203
 204 #ifdef BE_VERBOSE
 205         printk("Pegasos II/Marvell MV64361: init is over\n");
 206 #endif
 207
 208         return ret;
 209 }
 210
 211 device_initcall(mv643xx_eth_add_pds);