From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/sparc/kernel/central.c | 270 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 270 insertions(+) create mode 100644 arch/sparc/kernel/central.c (limited to 'arch/sparc/kernel/central.c') diff --git a/arch/sparc/kernel/central.c b/arch/sparc/kernel/central.c new file mode 100644 index 000000000..469695829 --- /dev/null +++ b/arch/sparc/kernel/central.c @@ -0,0 +1,270 @@ +/* central.c: Central FHC driver for Sunfire/Starfire/Wildfire. + * + * Copyright (C) 1997, 1999, 2008 David S. Miller (davem@davemloft.net) + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +struct clock_board { + void __iomem *clock_freq_regs; + void __iomem *clock_regs; + void __iomem *clock_ver_reg; + int num_slots; + struct resource leds_resource; + struct platform_device leds_pdev; +}; + +struct fhc { + void __iomem *pregs; + bool central; + bool jtag_master; + int board_num; + struct resource leds_resource; + struct platform_device leds_pdev; +}; + +static int clock_board_calc_nslots(struct clock_board *p) +{ + u8 reg = upa_readb(p->clock_regs + CLOCK_STAT1) & 0xc0; + + switch (reg) { + case 0x40: + return 16; + + case 0xc0: + return 8; + + case 0x80: + reg = 0; + if (p->clock_ver_reg) + reg = upa_readb(p->clock_ver_reg); + if (reg) { + if (reg & 0x80) + return 4; + else + return 5; + } + /* Fallthrough */ + default: + return 4; + } +} + +static int clock_board_probe(struct platform_device *op) +{ + struct clock_board *p = kzalloc(sizeof(*p), GFP_KERNEL); + int err = -ENOMEM; + + if (!p) { + printk(KERN_ERR "clock_board: Cannot allocate struct clock_board\n"); + goto out; + } + + p->clock_freq_regs = of_ioremap(&op->resource[0], 0, + resource_size(&op->resource[0]), + "clock_board_freq"); + if (!p->clock_freq_regs) { + printk(KERN_ERR "clock_board: Cannot map clock_freq_regs\n"); + goto out_free; + } + + p->clock_regs = of_ioremap(&op->resource[1], 0, + resource_size(&op->resource[1]), + "clock_board_regs"); + if (!p->clock_regs) { + printk(KERN_ERR "clock_board: Cannot map clock_regs\n"); + goto out_unmap_clock_freq_regs; + } + + if (op->resource[2].flags) { + p->clock_ver_reg = of_ioremap(&op->resource[2], 0, + resource_size(&op->resource[2]), + "clock_ver_reg"); + if (!p->clock_ver_reg) { + printk(KERN_ERR "clock_board: Cannot map clock_ver_reg\n"); + goto out_unmap_clock_regs; + } + } + + p->num_slots = clock_board_calc_nslots(p); + + p->leds_resource.start = (unsigned long) + (p->clock_regs + CLOCK_CTRL); + p->leds_resource.end = p->leds_resource.start; + p->leds_resource.name = "leds"; + + p->leds_pdev.name = "sunfire-clockboard-leds"; + p->leds_pdev.id = -1; + p->leds_pdev.resource = &p->leds_resource; + p->leds_pdev.num_resources = 1; + p->leds_pdev.dev.parent = &op->dev; + + err = platform_device_register(&p->leds_pdev); + if (err) { + printk(KERN_ERR "clock_board: Could not register LEDS " + "platform device\n"); + goto out_unmap_clock_ver_reg; + } + + printk(KERN_INFO "clock_board: Detected %d slot Enterprise system.\n", + p->num_slots); + + err = 0; +out: + return err; + +out_unmap_clock_ver_reg: + if (p->clock_ver_reg) + of_iounmap(&op->resource[2], p->clock_ver_reg, + resource_size(&op->resource[2])); + +out_unmap_clock_regs: + of_iounmap(&op->resource[1], p->clock_regs, + resource_size(&op->resource[1])); + +out_unmap_clock_freq_regs: + of_iounmap(&op->resource[0], p->clock_freq_regs, + resource_size(&op->resource[0])); + +out_free: + kfree(p); + goto out; +} + +static const struct of_device_id clock_board_match[] = { + { + .name = "clock-board", + }, + {}, +}; + +static struct platform_driver clock_board_driver = { + .probe = clock_board_probe, + .driver = { + .name = "clock_board", + .of_match_table = clock_board_match, + }, +}; + +static int fhc_probe(struct platform_device *op) +{ + struct fhc *p = kzalloc(sizeof(*p), GFP_KERNEL); + int err = -ENOMEM; + u32 reg; + + if (!p) { + printk(KERN_ERR "fhc: Cannot allocate struct fhc\n"); + goto out; + } + + if (!strcmp(op->dev.of_node->parent->name, "central")) + p->central = true; + + p->pregs = of_ioremap(&op->resource[0], 0, + resource_size(&op->resource[0]), + "fhc_pregs"); + if (!p->pregs) { + printk(KERN_ERR "fhc: Cannot map pregs\n"); + goto out_free; + } + + if (p->central) { + reg = upa_readl(p->pregs + FHC_PREGS_BSR); + p->board_num = ((reg >> 16) & 1) | ((reg >> 12) & 0x0e); + } else { + p->board_num = of_getintprop_default(op->dev.of_node, "board#", -1); + if (p->board_num == -1) { + printk(KERN_ERR "fhc: No board# property\n"); + goto out_unmap_pregs; + } + if (upa_readl(p->pregs + FHC_PREGS_JCTRL) & FHC_JTAG_CTRL_MENAB) + p->jtag_master = true; + } + + if (!p->central) { + p->leds_resource.start = (unsigned long) + (p->pregs + FHC_PREGS_CTRL); + p->leds_resource.end = p->leds_resource.start; + p->leds_resource.name = "leds"; + + p->leds_pdev.name = "sunfire-fhc-leds"; + p->leds_pdev.id = p->board_num; + p->leds_pdev.resource = &p->leds_resource; + p->leds_pdev.num_resources = 1; + p->leds_pdev.dev.parent = &op->dev; + + err = platform_device_register(&p->leds_pdev); + if (err) { + printk(KERN_ERR "fhc: Could not register LEDS " + "platform device\n"); + goto out_unmap_pregs; + } + } + reg = upa_readl(p->pregs + FHC_PREGS_CTRL); + + if (!p->central) + reg |= FHC_CONTROL_IXIST; + + reg &= ~(FHC_CONTROL_AOFF | + FHC_CONTROL_BOFF | + FHC_CONTROL_SLINE); + + upa_writel(reg, p->pregs + FHC_PREGS_CTRL); + upa_readl(p->pregs + FHC_PREGS_CTRL); + + reg = upa_readl(p->pregs + FHC_PREGS_ID); + printk(KERN_INFO "fhc: Board #%d, Version[%x] PartID[%x] Manuf[%x] %s\n", + p->board_num, + (reg & FHC_ID_VERS) >> 28, + (reg & FHC_ID_PARTID) >> 12, + (reg & FHC_ID_MANUF) >> 1, + (p->jtag_master ? + "(JTAG Master)" : + (p->central ? "(Central)" : ""))); + + err = 0; + +out: + return err; + +out_unmap_pregs: + of_iounmap(&op->resource[0], p->pregs, resource_size(&op->resource[0])); + +out_free: + kfree(p); + goto out; +} + +static const struct of_device_id fhc_match[] = { + { + .name = "fhc", + }, + {}, +}; + +static struct platform_driver fhc_driver = { + .probe = fhc_probe, + .driver = { + .name = "fhc", + .of_match_table = fhc_match, + }, +}; + +static int __init sunfire_init(void) +{ + (void) platform_driver_register(&fhc_driver); + (void) platform_driver_register(&clock_board_driver); + return 0; +} + +fs_initcall(sunfire_init); -- cgit v1.2.3-54-g00ecf