src/soc/qualcomm/ipq806x/gpio.c

   1 /* SPDX-License-Identifier: BSD-3-Clause */
   2
   3 #include <device/mmio.h>
   4 #include <gpio.h>
   5 #include <soc/iomap.h>
   6
   7 /*******************************************************
   8 Function description: check for invalid GPIO #
   9 Arguments :
  10 gpio_t gpio - Gpio number
  11
  12 Return : GPIO Valid(0)/Invalid(1)
  13 *******************************************************/
  14
  15 static inline int gpio_not_valid(gpio_t gpio)
  16 {
  17         return (gpio > GPIO_MAX_NUM);
  18 }
  19
  20 /*******************************************************
  21 Function description: configure GPIO functionality
  22 Arguments :
  23 gpio_t gpio - Gpio number
  24 unsigned func - Functionality number
  25 unsigned pull - pull up/down, no pull range(0-3)
  26 unsigned drvstr - range (0 - 7)-> (2- 16)MA steps of 2
  27 unsigned enable - 0 Disable, 1 - Enable.
  28
  29 Return : None
  30 *******************************************************/
  31
  32 void gpio_tlmm_config_set(gpio_t gpio, unsigned int func,
  33                           unsigned int pull, unsigned int drvstr,
  34                           unsigned int enable)
  35 {
  36         unsigned int val = 0;
  37
  38         if (gpio_not_valid(gpio))
  39                 return;
  40
  41         val |= (pull & GPIO_CFG_PULL_MASK) << GPIO_CFG_PULL_SHIFT;
  42         val |= (func & GPIO_CFG_FUNC_MASK) << GPIO_CFG_FUNC_SHIFT;
  43         val |= (drvstr & GPIO_CFG_DRV_MASK) << GPIO_CFG_DRV_SHIFT;
  44         val |= (enable & GPIO_CFG_OE_MASK) << GPIO_CFG_OE_SHIFT;
  45
  46         write32(GPIO_CONFIG_ADDR(gpio), val);
  47 }
  48
  49 /*******************************************************
  50 Function description: Get GPIO configuration
  51 Arguments :
  52 gpio_t gpio - Gpio number
  53 unsigned *func - Functionality number
  54 unsigned *pull - pull up/down, no pull range(0-3)
  55 unsigned *drvstr - range (0 - 7)-> (2- 16)MA steps of 2
  56 unsigned *enable - 0 - Disable, 1- Enable.
  57
  58 Return : None
  59 *******************************************************/
  60
  61 void gpio_tlmm_config_get(gpio_t gpio, unsigned int *func,
  62                           unsigned int *pull, unsigned int *drvstr,
  63                           unsigned int *enable)
  64 {
  65         unsigned int val;
  66         void *addr = GPIO_CONFIG_ADDR(gpio);
  67
  68         if (gpio_not_valid(gpio))
  69                 return;
  70
  71         val = read32(addr);
  72
  73         *pull = (val >> GPIO_CFG_PULL_SHIFT) & GPIO_CFG_PULL_MASK;
  74         *func = (val >> GPIO_CFG_FUNC_SHIFT) & GPIO_CFG_FUNC_MASK;
  75         *drvstr = (val >> GPIO_CFG_DRV_SHIFT) & GPIO_CFG_DRV_MASK;
  76         *enable = (val >> GPIO_CFG_OE_SHIFT) & GPIO_CFG_OE_MASK;
  77 }
  78
  79 /*******************************************************
  80 Function description: get GPIO IO functionality details
  81 Arguments :
  82 gpio_t gpio - Gpio number
  83 unsigned *in - Value of GPIO input
  84 unsigned *out - Value of GPIO output
  85
  86 Return : None
  87 *******************************************************/
  88 int gpio_get(gpio_t gpio)
  89 {
  90         if (gpio_not_valid(gpio))
  91                 return -1;
  92
  93         return (read32(GPIO_IN_OUT_ADDR(gpio)) >> GPIO_IO_IN_SHIFT) &
  94                 GPIO_IO_IN_MASK;
  95 }
  96
  97 void gpio_set(gpio_t gpio, int value)
  98 {
  99         if (gpio_not_valid(gpio))
 100                 return;
 101
 102         write32(GPIO_IN_OUT_ADDR(gpio), (value & 1) << GPIO_IO_OUT_SHIFT);
 103 }
 104
 105 void gpio_input_pulldown(gpio_t gpio)
 106 {
 107         gpio_tlmm_config_set(gpio, GPIO_FUNC_DISABLE,
 108                              GPIO_PULL_DOWN, GPIO_2MA, GPIO_DISABLE);
 109 }
 110
 111 void gpio_input_pullup(gpio_t gpio)
 112 {
 113         gpio_tlmm_config_set(gpio, GPIO_FUNC_DISABLE,
 114                              GPIO_PULL_UP, GPIO_2MA, GPIO_DISABLE);
 115 }
 116
 117 void gpio_input(gpio_t gpio)
 118 {
 119         gpio_tlmm_config_set(gpio, GPIO_FUNC_DISABLE,
 120                              GPIO_NO_PULL, GPIO_2MA, GPIO_DISABLE);
 121 }