src/southbridge/nvidia/ck804/ck804_smbus.c

   1 /*
   2  * Copyright 2004 Tyan Computer
   3  *  by yhlu@tyan.com
   4  */
   5 #include <console/console.h>
   6 #include <device/device.h>
   7 #include <device/pci.h>
   8 #include <device/pci_ids.h>
   9 #include <device/pci_ops.h>
  10 #include <device/smbus.h>
  11 #include <bitops.h>
  12 #include <arch/io.h>
  13 #include "ck804.h"
  14 #include "ck804_smbus.h"
  15
  16 static int lsmbus_recv_byte(device_t dev)
  17 {
  18         unsigned device;
  19         struct resource *res;
  20         struct bus *pbus;
  21
  22         device = dev->path.u.i2c.device;
  23         pbus = get_pbus_smbus(dev);
  24
  25         res = find_resource(pbus->dev, 0x20 + (pbus->link * 4));
  26
  27         return do_smbus_recv_byte(res->base, device);
  28 }
  29
  30 static int lsmbus_send_byte(device_t dev, uint8_t val)
  31 {
  32         unsigned device;
  33         struct resource *res;
  34         struct bus *pbus;
  35
  36         device = dev->path.u.i2c.device;
  37         pbus = get_pbus_smbus(dev);
  38
  39         res = find_resource(pbus->dev, 0x20 + (pbus->link * 4));
  40
  41         return do_smbus_send_byte(res->base, device, val);
  42 }
  43
  44 static int lsmbus_read_byte(device_t dev, uint8_t address)
  45 {
  46         unsigned device;
  47         struct resource *res;
  48         struct bus *pbus;
  49
  50         device = dev->path.u.i2c.device;
  51         pbus = get_pbus_smbus(dev);
  52
  53         res = find_resource(pbus->dev, 0x20 + (pbus->link * 4));
  54
  55         return do_smbus_read_byte(res->base, device, address);
  56 }
  57
  58 static int lsmbus_write_byte(device_t dev, uint8_t address, uint8_t val)
  59 {
  60         unsigned device;
  61         struct resource *res;
  62         struct bus *pbus;
  63
  64         device = dev->path.u.i2c.device;
  65         pbus = get_pbus_smbus(dev);
  66
  67         res = find_resource(pbus->dev, 0x20 + (pbus->link * 4));
  68
  69         return do_smbus_write_byte(res->base, device, address, val);
  70 }
  71 static struct smbus_bus_operations lops_smbus_bus = {
  72         .recv_byte  = lsmbus_recv_byte,
  73         .send_byte  = lsmbus_send_byte,
  74         .read_byte  = lsmbus_read_byte,
  75         .write_byte = lsmbus_write_byte,
  76 };
  77
  78 static void lpci_set_subsystem(device_t dev, unsigned vendor, unsigned device)
  79 {
  80         pci_write_config32(dev, 0x40,
  81                 ((device & 0xffff) << 16) | (vendor & 0xffff));
  82 }
  83
  84 static struct pci_operations lops_pci = {
  85         .set_subsystem = lpci_set_subsystem,
  86 };
  87 static struct device_operations smbus_ops = {
  88         .read_resources   = pci_dev_read_resources,
  89         .set_resources    = pci_dev_set_resources,
  90         .enable_resources = pci_dev_enable_resources,
  91         .init             = 0,
  92         .scan_bus         = scan_static_bus,
  93 //        .enable           = ck804_enable,
  94         .ops_pci          = &lops_pci,
  95         .ops_smbus_bus    = &lops_smbus_bus,
  96 };
  97 static const struct pci_driver smbus_driver __pci_driver = {
  98         .ops    = &smbus_ops,
  99         .vendor = PCI_VENDOR_ID_NVIDIA,
 100         .device = PCI_DEVICE_ID_NVIDIA_CK804_SM,
 101 };
 102