David S. Miller | d979f17 | 2007-10-27 00:13:04 -0700 | [diff] [blame] | 1 | /* central.c: Central FHC driver for Sunfire/Starfire/Wildfire. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 3 | * Copyright (C) 1997, 1999, 2008 David S. Miller (davem@davemloft.net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #include <linux/kernel.h> |
| 7 | #include <linux/types.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 8 | #include <linux/slab.h> |
Paul Gortmaker | 7b64db6 | 2011-07-18 15:57:46 -0400 | [diff] [blame] | 9 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/init.h> |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 12 | #include <linux/of_device.h> |
| 13 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <asm/fhc.h> |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 16 | #include <asm/upa.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 18 | struct clock_board { |
| 19 | void __iomem *clock_freq_regs; |
| 20 | void __iomem *clock_regs; |
| 21 | void __iomem *clock_ver_reg; |
| 22 | int num_slots; |
| 23 | struct resource leds_resource; |
| 24 | struct platform_device leds_pdev; |
| 25 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 27 | struct fhc { |
| 28 | void __iomem *pregs; |
| 29 | bool central; |
| 30 | bool jtag_master; |
| 31 | int board_num; |
| 32 | struct resource leds_resource; |
| 33 | struct platform_device leds_pdev; |
| 34 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Greg Kroah-Hartman | 7c9503b | 2012-12-21 14:03:26 -0800 | [diff] [blame] | 36 | static int clock_board_calc_nslots(struct clock_board *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | { |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 38 | u8 reg = upa_readb(p->clock_regs + CLOCK_STAT1) & 0xc0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 40 | switch (reg) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | case 0x40: |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 42 | return 16; |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | case 0xc0: |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 45 | return 8; |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | case 0x80: |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 48 | reg = 0; |
| 49 | if (p->clock_ver_reg) |
| 50 | reg = upa_readb(p->clock_ver_reg); |
| 51 | if (reg) { |
| 52 | if (reg & 0x80) |
| 53 | return 4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | else |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 55 | return 5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | } |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 57 | /* Fallthrough */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | default: |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 59 | return 4; |
| 60 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | } |
| 62 | |
Greg Kroah-Hartman | 7c9503b | 2012-12-21 14:03:26 -0800 | [diff] [blame] | 63 | static int clock_board_probe(struct platform_device *op) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 65 | struct clock_board *p = kzalloc(sizeof(*p), GFP_KERNEL); |
| 66 | int err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 68 | if (!p) { |
| 69 | printk(KERN_ERR "clock_board: Cannot allocate struct clock_board\n"); |
| 70 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | } |
| 72 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 73 | p->clock_freq_regs = of_ioremap(&op->resource[0], 0, |
| 74 | resource_size(&op->resource[0]), |
| 75 | "clock_board_freq"); |
| 76 | if (!p->clock_freq_regs) { |
| 77 | printk(KERN_ERR "clock_board: Cannot map clock_freq_regs\n"); |
| 78 | goto out_free; |
David S. Miller | cecc4e9 | 2006-06-22 19:53:24 -0700 | [diff] [blame] | 79 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 81 | p->clock_regs = of_ioremap(&op->resource[1], 0, |
| 82 | resource_size(&op->resource[1]), |
| 83 | "clock_board_regs"); |
| 84 | if (!p->clock_regs) { |
| 85 | printk(KERN_ERR "clock_board: Cannot map clock_regs\n"); |
| 86 | goto out_unmap_clock_freq_regs; |
| 87 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 89 | if (op->resource[2].flags) { |
| 90 | p->clock_ver_reg = of_ioremap(&op->resource[2], 0, |
| 91 | resource_size(&op->resource[2]), |
| 92 | "clock_ver_reg"); |
| 93 | if (!p->clock_ver_reg) { |
| 94 | printk(KERN_ERR "clock_board: Cannot map clock_ver_reg\n"); |
| 95 | goto out_unmap_clock_regs; |
| 96 | } |
| 97 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 99 | p->num_slots = clock_board_calc_nslots(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 101 | p->leds_resource.start = (unsigned long) |
| 102 | (p->clock_regs + CLOCK_CTRL); |
Roel Kluin | 0931714 | 2010-01-15 01:27:49 -0800 | [diff] [blame] | 103 | p->leds_resource.end = p->leds_resource.start; |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 104 | p->leds_resource.name = "leds"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 106 | p->leds_pdev.name = "sunfire-clockboard-leds"; |
David S. Miller | b7c18c1 | 2009-01-18 22:42:15 -0800 | [diff] [blame] | 107 | p->leds_pdev.id = -1; |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 108 | p->leds_pdev.resource = &p->leds_resource; |
| 109 | p->leds_pdev.num_resources = 1; |
| 110 | p->leds_pdev.dev.parent = &op->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 112 | err = platform_device_register(&p->leds_pdev); |
| 113 | if (err) { |
| 114 | printk(KERN_ERR "clock_board: Could not register LEDS " |
| 115 | "platform device\n"); |
| 116 | goto out_unmap_clock_ver_reg; |
| 117 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 119 | printk(KERN_INFO "clock_board: Detected %d slot Enterprise system.\n", |
| 120 | p->num_slots); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 122 | err = 0; |
| 123 | out: |
| 124 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 126 | out_unmap_clock_ver_reg: |
| 127 | if (p->clock_ver_reg) |
| 128 | of_iounmap(&op->resource[2], p->clock_ver_reg, |
| 129 | resource_size(&op->resource[2])); |
| 130 | |
| 131 | out_unmap_clock_regs: |
| 132 | of_iounmap(&op->resource[1], p->clock_regs, |
| 133 | resource_size(&op->resource[1])); |
| 134 | |
| 135 | out_unmap_clock_freq_regs: |
| 136 | of_iounmap(&op->resource[0], p->clock_freq_regs, |
| 137 | resource_size(&op->resource[0])); |
| 138 | |
| 139 | out_free: |
| 140 | kfree(p); |
| 141 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | } |
| 143 | |
David S. Miller | 3628aa0 | 2011-03-30 17:37:56 -0700 | [diff] [blame] | 144 | static const struct of_device_id clock_board_match[] = { |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 145 | { |
| 146 | .name = "clock-board", |
| 147 | }, |
| 148 | {}, |
| 149 | }; |
| 150 | |
Grant Likely | 4ebb24f | 2011-02-22 20:01:33 -0700 | [diff] [blame] | 151 | static struct platform_driver clock_board_driver = { |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 152 | .probe = clock_board_probe, |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 153 | .driver = { |
| 154 | .name = "clock_board", |
| 155 | .owner = THIS_MODULE, |
| 156 | .of_match_table = clock_board_match, |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 157 | }, |
| 158 | }; |
| 159 | |
Greg Kroah-Hartman | 7c9503b | 2012-12-21 14:03:26 -0800 | [diff] [blame] | 160 | static int fhc_probe(struct platform_device *op) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | { |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 162 | struct fhc *p = kzalloc(sizeof(*p), GFP_KERNEL); |
| 163 | int err = -ENOMEM; |
| 164 | u32 reg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 166 | if (!p) { |
| 167 | printk(KERN_ERR "fhc: Cannot allocate struct fhc\n"); |
| 168 | goto out; |
| 169 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 171 | if (!strcmp(op->dev.of_node->parent->name, "central")) |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 172 | p->central = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 174 | p->pregs = of_ioremap(&op->resource[0], 0, |
| 175 | resource_size(&op->resource[0]), |
| 176 | "fhc_pregs"); |
| 177 | if (!p->pregs) { |
| 178 | printk(KERN_ERR "fhc: Cannot map pregs\n"); |
| 179 | goto out_free; |
| 180 | } |
| 181 | |
| 182 | if (p->central) { |
| 183 | reg = upa_readl(p->pregs + FHC_PREGS_BSR); |
| 184 | p->board_num = ((reg >> 16) & 1) | ((reg >> 12) & 0x0e); |
| 185 | } else { |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 186 | p->board_num = of_getintprop_default(op->dev.of_node, "board#", -1); |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 187 | if (p->board_num == -1) { |
| 188 | printk(KERN_ERR "fhc: No board# property\n"); |
| 189 | goto out_unmap_pregs; |
| 190 | } |
| 191 | if (upa_readl(p->pregs + FHC_PREGS_JCTRL) & FHC_JTAG_CTRL_MENAB) |
| 192 | p->jtag_master = true; |
| 193 | } |
| 194 | |
| 195 | if (!p->central) { |
| 196 | p->leds_resource.start = (unsigned long) |
| 197 | (p->pregs + FHC_PREGS_CTRL); |
Roel Kluin | 0931714 | 2010-01-15 01:27:49 -0800 | [diff] [blame] | 198 | p->leds_resource.end = p->leds_resource.start; |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 199 | p->leds_resource.name = "leds"; |
| 200 | |
| 201 | p->leds_pdev.name = "sunfire-fhc-leds"; |
David S. Miller | b7c18c1 | 2009-01-18 22:42:15 -0800 | [diff] [blame] | 202 | p->leds_pdev.id = p->board_num; |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 203 | p->leds_pdev.resource = &p->leds_resource; |
| 204 | p->leds_pdev.num_resources = 1; |
| 205 | p->leds_pdev.dev.parent = &op->dev; |
| 206 | |
| 207 | err = platform_device_register(&p->leds_pdev); |
| 208 | if (err) { |
| 209 | printk(KERN_ERR "fhc: Could not register LEDS " |
| 210 | "platform device\n"); |
| 211 | goto out_unmap_pregs; |
| 212 | } |
| 213 | } |
| 214 | reg = upa_readl(p->pregs + FHC_PREGS_CTRL); |
| 215 | |
| 216 | if (!p->central) |
| 217 | reg |= FHC_CONTROL_IXIST; |
| 218 | |
| 219 | reg &= ~(FHC_CONTROL_AOFF | |
| 220 | FHC_CONTROL_BOFF | |
| 221 | FHC_CONTROL_SLINE); |
| 222 | |
| 223 | upa_writel(reg, p->pregs + FHC_PREGS_CTRL); |
| 224 | upa_readl(p->pregs + FHC_PREGS_CTRL); |
| 225 | |
| 226 | reg = upa_readl(p->pregs + FHC_PREGS_ID); |
| 227 | printk(KERN_INFO "fhc: Board #%d, Version[%x] PartID[%x] Manuf[%x] %s\n", |
| 228 | p->board_num, |
| 229 | (reg & FHC_ID_VERS) >> 28, |
| 230 | (reg & FHC_ID_PARTID) >> 12, |
| 231 | (reg & FHC_ID_MANUF) >> 1, |
| 232 | (p->jtag_master ? |
| 233 | "(JTAG Master)" : |
| 234 | (p->central ? "(Central)" : ""))); |
| 235 | |
| 236 | err = 0; |
| 237 | |
| 238 | out: |
| 239 | return err; |
| 240 | |
| 241 | out_unmap_pregs: |
| 242 | of_iounmap(&op->resource[0], p->pregs, resource_size(&op->resource[0])); |
| 243 | |
| 244 | out_free: |
| 245 | kfree(p); |
| 246 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | } |
| 248 | |
David S. Miller | 3628aa0 | 2011-03-30 17:37:56 -0700 | [diff] [blame] | 249 | static const struct of_device_id fhc_match[] = { |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 250 | { |
| 251 | .name = "fhc", |
| 252 | }, |
| 253 | {}, |
| 254 | }; |
| 255 | |
Grant Likely | 4ebb24f | 2011-02-22 20:01:33 -0700 | [diff] [blame] | 256 | static struct platform_driver fhc_driver = { |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 257 | .probe = fhc_probe, |
Grant Likely | 4018294 | 2010-04-13 16:13:02 -0700 | [diff] [blame] | 258 | .driver = { |
| 259 | .name = "fhc", |
| 260 | .owner = THIS_MODULE, |
| 261 | .of_match_table = fhc_match, |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 262 | }, |
| 263 | }; |
| 264 | |
| 265 | static int __init sunfire_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | { |
Grant Likely | 4ebb24f | 2011-02-22 20:01:33 -0700 | [diff] [blame] | 267 | (void) platform_driver_register(&fhc_driver); |
| 268 | (void) platform_driver_register(&clock_board_driver); |
David S. Miller | b69416b | 2008-08-31 20:56:15 -0700 | [diff] [blame] | 269 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |
| 271 | |
David S. Miller | a5a737e | 2012-05-10 11:00:46 -0700 | [diff] [blame] | 272 | fs_initcall(sunfire_init); |