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
  22  * down to current dev
  23   1 store get_pbus_smbus list link
  24   2 reverse the link and call set link */
  25
  26 int smbus_set_link(device_t dev)
  27 {
  28         struct bus *pbus_a[4]; // 4 level mux only. Enough?
  29         struct bus *pbus = dev->bus;
  30         int pbus_num=0;
  31         int i;
  32         while(pbus && pbus->dev && (pbus->dev->path.type==DEVICE_PATH_I2C)) {
  33                 pbus_a[pbus_num++] = pbus;
  34                 pbus = pbus->dev->bus;
  35         }
  36 //      printk_info("smbus_set_link: ");
  37         for (i=pbus_num-1; i>=0; i--) {
  38 //              printk_info(" %s[%d] -> ", dev_path(pbus_a[i]->dev), pbus_a[i]->link);
  39                 if (ops_smbus_bus(get_pbus_smbus(pbus_a[i]->dev))) {
  40                         if (pbus_a[i]->dev->ops && pbus_a[i]->dev->ops->set_link)
  41                                 pbus_a[i]->dev->ops->set_link(pbus_a[i]->dev, pbus_a[i]->link);
  42                 }
  43         }
  44 //      printk_info(" %s\n", dev_path(dev));
  45
  46         return pbus_num;
  47 }
  48
  49 int smbus_quick_read(device_t dev)
  50 {
  51         return ops_smbus_bus(get_pbus_smbus(dev))->quick_read(dev);
  52 }
  53 int smbus_quick_write(device_t dev)
  54 {
  55         return ops_smbus_bus(get_pbus_smbus(dev))->quick_write(dev);
  56 }
  57 int smbus_recv_byte(device_t dev)
  58 {
  59         return ops_smbus_bus(get_pbus_smbus(dev))->recv_byte(dev);
  60 }
  61 int smbus_send_byte(device_t dev, uint8_t byte)
  62 {
  63         return ops_smbus_bus(get_pbus_smbus(dev))->send_byte(dev, byte);
  64 }
  65 int smbus_read_byte(device_t dev, uint8_t addr)
  66 {
  67         return ops_smbus_bus(get_pbus_smbus(dev))->read_byte(dev, addr);
  68 }
  69 int smbus_write_byte(device_t dev, uint8_t addr, uint8_t val)
  70 {
  71         return ops_smbus_bus(get_pbus_smbus(dev))->write_byte(dev, addr, val);
  72 }
  73 int smbus_read_word(device_t dev, uint8_t addr)
  74 {
  75         return ops_smbus_bus(get_pbus_smbus(dev))->read_word(dev, addr);
  76 }
  77 int smbus_write_word(device_t dev, uint8_t addr, uint16_t val)
  78 {
  79         return ops_smbus_bus(get_pbus_smbus(dev))->write_word(dev, addr, val);
  80 }
  81 int smbus_process_call(device_t dev, uint8_t cmd, uint16_t data)
  82 {
  83         return ops_smbus_bus(get_pbus_smbus(dev))->process_call(dev, cmd, data);
  84 }
  85 int smbus_block_read(device_t dev, uint8_t cmd, uint8_t bytes, uint8_t *buffer)
  86 {
  87         return ops_smbus_bus(get_pbus_smbus(dev))->block_read(dev, cmd, bytes, buffer);
  88 }
  89 int smbus_block_write(device_t dev, uint8_t cmd, uint8_t bytes, const uint8_t *buffer)
  90 {
  91         return ops_smbus_bus(get_pbus_smbus(dev))->block_write(dev, cmd, bytes, buffer);
  92 }
  93
  94