diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2009-04-17 15:05:19 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-04-17 15:05:19 +0900 |
| commit | 4e7b7fdb129995640f144b7de114e109c6b46a2a (patch) | |
| tree | 9f3b7bc00884fa35c23a737bc70c8271384b6a89 /arch/sh/drivers | |
| parent | 0bbc9bc3189f24de946777af43c9033c8c4871e4 (diff) | |
| download | kernel_samsung_tuna-4e7b7fdb129995640f144b7de114e109c6b46a2a.zip kernel_samsung_tuna-4e7b7fdb129995640f144b7de114e109c6b46a2a.tar.gz kernel_samsung_tuna-4e7b7fdb129995640f144b7de114e109c6b46a2a.tar.bz2 | |
sh: pci: Rework SH7780 host controller detection.
This reworks how the host controller is probed, and makes it a bit more
verbose in the event a new type of controller is detected. Additionally,
we also log the revision information.
This now uses the proper access sizes for the vendor/device registers,
rather than relying on a larger access that encapsulated both of them.
Not all devices support 32-bit read cycles for these registers.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/drivers')
| -rw-r--r-- | arch/sh/drivers/pci/pci-sh7780.c | 42 | ||||
| -rw-r--r-- | arch/sh/drivers/pci/pci-sh7780.h | 5 |
2 files changed, 26 insertions, 21 deletions
diff --git a/arch/sh/drivers/pci/pci-sh7780.c b/arch/sh/drivers/pci/pci-sh7780.c index 7f4f590..63b5151 100644 --- a/arch/sh/drivers/pci/pci-sh7780.c +++ b/arch/sh/drivers/pci/pci-sh7780.c @@ -34,33 +34,39 @@ int __init sh7780_pci_init(struct pci_channel *chan) { unsigned int id; - int ret, match = 0; + const char *type = NULL; + int ret; - pr_debug("PCI: Starting intialization.\n"); + printk(KERN_NOTICE "PCI: Starting intialization.\n"); chan->reg_base = 0xfe040000; chan->io_base = 0xfe200000; - ctrl_outl(0x00000001, SH7780_PCI_VCR2); /* Enable PCIC */ - - /* check for SH7780/SH7780R hardware */ - id = pci_read_reg(chan, SH7780_PCIVID); - if ((id & 0xffff) == SH7780_VENDOR_ID) { - switch ((id >> 16) & 0xffff) { - case SH7763_DEVICE_ID: - case SH7780_DEVICE_ID: - case SH7781_DEVICE_ID: - case SH7785_DEVICE_ID: - match = 1; - break; - } - } + /* Enable CPU access to the PCIC registers. */ + __raw_writel(PCIECR_ENBL, PCIECR); - if (unlikely(!match)) { - printk(KERN_ERR "PCI: This is not an SH7780 (%x)\n", id); + id = __raw_readw(chan->reg_base + SH7780_PCIVID); + if (id != SH7780_VENDOR_ID) { + printk(KERN_ERR "PCI: Unknown vendor ID 0x%04x.\n", id); return -ENODEV; } + id = __raw_readw(chan->reg_base + SH7780_PCIDID); + type = (id == SH7763_DEVICE_ID) ? "SH7763" : + (id == SH7780_DEVICE_ID) ? "SH7780" : + (id == SH7781_DEVICE_ID) ? "SH7781" : + (id == SH7785_DEVICE_ID) ? "SH7785" : + NULL; + if (unlikely(!type)) { + printk(KERN_ERR "PCI: Found an unsupported Renesas host " + "controller, device id 0x%04x.\n", id); + return -EINVAL; + } + + printk(KERN_NOTICE "PCI: Found a Renesas %s host " + "controller, revision %d.\n", type, + __raw_readb(chan->reg_base + SH7780_PCIRID)); + if ((ret = sh4_pci_check_direct(chan)) != 0) return ret; diff --git a/arch/sh/drivers/pci/pci-sh7780.h b/arch/sh/drivers/pci/pci-sh7780.h index fffcf1d..213f1d8 100644 --- a/arch/sh/drivers/pci/pci-sh7780.h +++ b/arch/sh/drivers/pci/pci-sh7780.h @@ -20,9 +20,8 @@ #define SH7785_DEVICE_ID 0x0007 /* SH7780 Control Registers */ -#define SH7780_PCI_VCR0 0xFE000000 -#define SH7780_PCI_VCR1 0xFE000004 -#define SH7780_PCI_VCR2 0xFE000008 +#define PCIECR 0xFE000008 +#define PCIECR_ENBL 0x01 /* SH7780 Specific Values */ #define SH7780_PCI_CONFIG_BASE 0xFD000000 /* Config space base addr */ |