1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2009-2011 Florian Fainelli <florian@openwrt.org> 7 * Copyright (C) 2010 Tanguy Bouzeloc <tanguy.bouzeloc@efixo.com> 8 */ 9 10 #include <linux/init.h> 11 #include <linux/kernel.h> 12 #include <linux/export.h> 13 #include <linux/platform_device.h> 14 #include <linux/err.h> 15 #include <linux/clk.h> 16 17 #include <bcm63xx_cpu.h> 18 #include <bcm63xx_dev_spi.h> 19 #include <bcm63xx_regs.h> 20 21 #ifdef BCMCPU_RUNTIME_DETECT 22 /* 23 * register offsets 24 */ 25 static const unsigned long bcm6338_regs_spi[] = { 26 __GEN_SPI_REGS_TABLE(6338) 27 }; 28 29 static const unsigned long bcm6348_regs_spi[] = { 30 __GEN_SPI_REGS_TABLE(6348) 31 }; 32 33 static const unsigned long bcm6358_regs_spi[] = { 34 __GEN_SPI_REGS_TABLE(6358) 35 }; 36 37 static const unsigned long bcm6368_regs_spi[] = { 38 __GEN_SPI_REGS_TABLE(6368) 39 }; 40 41 const unsigned long *bcm63xx_regs_spi; 42 EXPORT_SYMBOL(bcm63xx_regs_spi); 43 44 static __init void bcm63xx_spi_regs_init(void) 45 { 46 if (BCMCPU_IS_6338()) 47 bcm63xx_regs_spi = bcm6338_regs_spi; 48 if (BCMCPU_IS_6348()) 49 bcm63xx_regs_spi = bcm6348_regs_spi; 50 if (BCMCPU_IS_6358()) 51 bcm63xx_regs_spi = bcm6358_regs_spi; 52 if (BCMCPU_IS_6368()) 53 bcm63xx_regs_spi = bcm6368_regs_spi; 54 } 55 #else 56 static __init void bcm63xx_spi_regs_init(void) { } 57 #endif 58 59 static struct resource spi_resources[] = { 60 { 61 .start = -1, /* filled at runtime */ 62 .end = -1, /* filled at runtime */ 63 .flags = IORESOURCE_MEM, 64 }, 65 { 66 .start = -1, /* filled at runtime */ 67 .flags = IORESOURCE_IRQ, 68 }, 69 }; 70 71 static struct bcm63xx_spi_pdata spi_pdata = { 72 .bus_num = 0, 73 .num_chipselect = 8, 74 }; 75 76 static struct platform_device bcm63xx_spi_device = { 77 .name = "bcm63xx-spi", 78 .id = -1, 79 .num_resources = ARRAY_SIZE(spi_resources), 80 .resource = spi_resources, 81 .dev = { 82 .platform_data = &spi_pdata, 83 }, 84 }; 85 86 int __init bcm63xx_spi_register(void) 87 { 88 struct clk *periph_clk; 89 90 if (BCMCPU_IS_6328() || BCMCPU_IS_6345()) 91 return -ENODEV; 92 93 periph_clk = clk_get(NULL, "periph"); 94 if (IS_ERR(periph_clk)) { 95 pr_err("unable to get periph clock\n"); 96 return -ENODEV; 97 } 98 99 /* Set bus frequency */ 100 spi_pdata.speed_hz = clk_get_rate(periph_clk); 101 102 spi_resources[0].start = bcm63xx_regset_address(RSET_SPI); 103 spi_resources[0].end = spi_resources[0].start; 104 spi_resources[1].start = bcm63xx_get_irq_number(IRQ_SPI); 105 106 if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) { 107 spi_resources[0].end += BCM_6338_RSET_SPI_SIZE - 1; 108 spi_pdata.fifo_size = SPI_6338_MSG_DATA_SIZE; 109 } 110 111 if (BCMCPU_IS_6358() || BCMCPU_IS_6368()) { 112 spi_resources[0].end += BCM_6358_RSET_SPI_SIZE - 1; 113 spi_pdata.fifo_size = SPI_6358_MSG_DATA_SIZE; 114 } 115 116 bcm63xx_spi_regs_init(); 117 118 return platform_device_register(&bcm63xx_spi_device); 119 } 120