src/devices/smbus_ops.c

   1 #include <console/console.h>
   2 #include <stdint.h>
   3 #include <device/device.h>
   4 #include <device/path.h>
   5 #include <device/smbus.h>
   6
   7 struct bus *get_pbus_smbus(device_t dev)
   8 {
   9         struct bus *pbus = dev->bus;
  10         while(pbus && pbus->dev && !ops_smbus_bus(pbus)) {
  11                 pbus = pbus->dev->bus;
  12         }
  13         if (!pbus || !pbus->dev || !pbus->dev->ops || !pbus->dev->ops->ops_smbus_bus) {
  14                 printk_alert("%s Cannot find smbus bus operations", dev_path(dev));
  15                 die("");
  16                 for(;;);
  17         }
  18         return pbus;
  19 }
  20
  21         /*multi level i2c MUX??? may need to find the first i2c device and then set link down to current dev
  22                  1 store get_pbus_smbus list link
  23                  2 reverse the link and call set link */
  24
  25 int smbus_set_link(device_t dev)
  26 {
  27         struct bus *pbus_a[4]; // 4 level mux only. Enough?
  28         struct bus *pbus = dev->bus;
  29         int pbus_num=0;
  30         int i;
  31         while(pbus && pbus->dev && (pbus->dev->path.type==DEVICE_PATH_I2C)) {
  32                 pbus_a[pbus_num++] = pbus;
  33                 pbus = pbus->dev->bus;
  34         }
  35 //      printk_info("smbus_set_link: ");
  36         for(i=pbus_num-1; i>=0; i--) {
  37 //              printk_info(" %s[%d] -> ", dev_path(pbus_a[i]->dev), pbus_a[i]->link);
  38                 if(ops_smbus_bus(get_pbus_smbus(pbus_a[i]->dev))) {
  39                         if(pbus_a[i]->dev->ops && pbus_a[i]->dev->ops->set_link)
  40                                 pbus_a[i]->dev->ops->set_link(pbus_a[i]->dev, pbus_a[i]->link);
  41                 }
  42         }
  43 //      printk_info(" %s\n", dev_path(dev));
  44
  45         return pbus_num;
  46 }
  47
  48 int smbus_quick_read(device_t dev)
  49 {
  50         return ops_smbus_bus(get_pbus_smbus(dev))->quick_read(dev);
  51 }
  52 int smbus_quick_write(device_t dev)
  53 {
  54         return ops_smbus_bus(get_pbus_smbus(dev))->quick_write(dev);
  55 }
  56 int smbus_recv_byte(device_t dev)
  57 {
  58         return ops_smbus_bus(get_pbus_smbus(dev))->recv_byte(dev);
  59 }
  60 int smbus_send_byte(device_t dev, uint8_t byte)
  61 {
  62         return ops_smbus_bus(get_pbus_smbus(dev))->send_byte(dev, byte);
  63 }
  64 int smbus_read_byte(device_t dev, uint8_t addr)
  65 {
  66         return ops_smbus_bus(get_pbus_smbus(dev))->read_byte(dev, addr);
  67 }
  68 int smbus_write_byte(device_t dev, uint8_t addr, uint8_t val)
  69 {
  70         return ops_smbus_bus(get_pbus_smbus(dev))->write_byte(dev, addr, val);
  71 }
  72 int smbus_read_word(device_t dev, uint8_t addr)
  73 {
  74         return ops_smbus_bus(get_pbus_smbus(dev))->read_word(dev, addr);
  75 }
  76 int smbus_write_word(device_t dev, uint8_t addr, uint16_t val)
  77 {
  78         return ops_smbus_bus(get_pbus_smbus(dev))->write_word(dev, addr, val);
  79 }
  80 int smbus_process_call(device_t dev, uint8_t cmd, uint16_t data)
  81 {
  82         return ops_smbus_bus(get_pbus_smbus(dev))->process_call(dev, cmd, data);
  83 }
  84 int smbus_block_read(device_t dev, uint8_t cmd, uint8_t bytes, uint8_t *buffer)
  85 {
  86         return ops_smbus_bus(get_pbus_smbus(dev))->block_read(dev, cmd, bytes, buffer);
  87 }
  88 int smbus_block_write(device_t dev, uint8_t cmd, uint8_t bytes, const uint8_t *buffer)
  89 {
  90         return ops_smbus_bus(get_pbus_smbus(dev))->block_write(dev, cmd, bytes, buffer);
  91 }
  92
  93