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pci: add basic support for Apple SunGEM

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No driver, but we read the MAC address from the chip and write
it into the device-tree where Linux and MacOS look for it. We
also set the right compatible property for MacOS to pick it up.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
This commit is contained in:
Mark Cave-Ayland
2017-09-05 22:35:37 +01:00
parent 7781886d9d
commit 5923802972
4 changed files with 37 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/pci.c
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@ -685,6 +685,35 @@ int rtl8139_config_cb(const pci_config_t *config)
return eth_config_cb(config);
}
int sungem_config_cb (const pci_config_t *config)
{
phandle_t ph = get_cur_dev();
uint32_t val, *mmio;
uint8_t mac[6];
ucell virt;
#define MAC_ADDR0 (0x6080UL/4) /* MAC Address 0 Register */
#define MAC_ADDR1 (0x6084UL/4) /* MAC Address 1 Register */
#define MAC_ADDR2 (0x6088UL/4) /* MAC Address 2 Register */
/* Map PCI memory BAR 0 to access the sungem registers */
virt = ob_pci_map(config->assigned[0], 0x8000);
mmio = (void *)(uintptr_t)virt;
val = __le32_to_cpu(*(mmio + MAC_ADDR0));
mac[5] = val & 0xff;
mac[4] = (val >> 8) & 0xff;
val = __le32_to_cpu(*(mmio + MAC_ADDR1));
mac[3] = val & 0xff;
mac[2] = (val >> 8) & 0xff;
val = __le32_to_cpu(*(mmio + MAC_ADDR2));
mac[1] = val & 0xff;
mac[0] = (val >> 8) & 0xff;
set_property(ph, "local-mac-address", (char *)mac, 6);
return 0;
}
/*
* "Designing PCI Cards and Drivers for Power Macintosh Computers", p. 454
*

6
drivers/pci_database.c
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@ -134,6 +134,12 @@ static const pci_dev_t eth_devices[] = {
0, 0, 0,
rtl8139_config_cb, "ethernet",
},
{
PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC,
NULL, "ethernet", NULL, "gmac\0",
0, 0, 0,
sungem_config_cb, "ethernet",
},
{
/* Virtio-network controller */
PCI_VENDOR_ID_REDHAT_QUMRANET, PCI_DEVICE_ID_VIRTIO_NET,

1
drivers/pci_database.h
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@ -41,6 +41,7 @@ extern int ebus_config_cb(const pci_config_t *config);
extern int i82378_config_cb(const pci_config_t *config);
extern int usb_ohci_config_cb(const pci_config_t *config);
extern int rtl8139_config_cb(const pci_config_t *config);
extern int sungem_config_cb (const pci_config_t *config);
static inline int pci_compat_len(const pci_dev_t *dev)
{

1
include/drivers/pci.h
View File

@ -202,6 +202,7 @@ extern const pci_arch_t *arch;
#define PCI_DEVICE_ID_APPLE_UNI_N_I_PCI 0x001e
#define PCI_DEVICE_ID_APPLE_UNI_N_PCI 0x001f
#define PCI_DEVICE_ID_APPLE_UNI_N_AGP 0x0020
#define PCI_DEVICE_ID_APPLE_UNI_N_GMAC 0x0021
#define PCI_DEVICE_ID_APPLE_UNI_N_KEYL 0x0022
#define PCI_DEVICE_ID_APPLE_KEYL_USB 0x003f
#define PCI_DEVICE_ID_APPLE_U3_AGP 0x004b