1 // SPDX-License-Identifier: GPL-2.0+
3 * Atmel PIO4 device driver
5 * Copyright (C) 2015 Atmel Corporation
6 * Wenyou.Yang <wenyou.yang@atmel.com>
13 #include <asm/arch/hardware.h>
15 #include <linux/bitops.h>
16 #include <mach/gpio.h>
17 #include <mach/atmel_pio4.h>
19 DECLARE_GLOBAL_DATA_PTR;
21 static struct atmel_pio4_port *atmel_pio4_port_base(u32 port)
23 struct atmel_pio4_port *base = NULL;
27 base = (struct atmel_pio4_port *)ATMEL_BASE_PIOA;
30 base = (struct atmel_pio4_port *)ATMEL_BASE_PIOB;
33 base = (struct atmel_pio4_port *)ATMEL_BASE_PIOC;
36 base = (struct atmel_pio4_port *)ATMEL_BASE_PIOD;
39 printf("Error: Atmel PIO4: Failed to get PIO base of port#%d!\n",
47 static int atmel_pio4_config_io_func(u32 port, u32 pin,
50 struct atmel_pio4_port *port_base;
53 if (pin >= ATMEL_PIO_NPINS_PER_BANK)
56 port_base = atmel_pio4_port_base(port);
64 writel(mask, &port_base->mskr);
65 writel(reg, &port_base->cfgr);
70 int atmel_pio4_set_gpio(u32 port, u32 pin, u32 config)
72 return atmel_pio4_config_io_func(port, pin,
73 ATMEL_PIO_CFGR_FUNC_GPIO,
77 int atmel_pio4_set_a_periph(u32 port, u32 pin, u32 config)
79 return atmel_pio4_config_io_func(port, pin,
80 ATMEL_PIO_CFGR_FUNC_PERIPH_A,
84 int atmel_pio4_set_b_periph(u32 port, u32 pin, u32 config)
86 return atmel_pio4_config_io_func(port, pin,
87 ATMEL_PIO_CFGR_FUNC_PERIPH_B,
91 int atmel_pio4_set_c_periph(u32 port, u32 pin, u32 config)
93 return atmel_pio4_config_io_func(port, pin,
94 ATMEL_PIO_CFGR_FUNC_PERIPH_C,
98 int atmel_pio4_set_d_periph(u32 port, u32 pin, u32 config)
100 return atmel_pio4_config_io_func(port, pin,
101 ATMEL_PIO_CFGR_FUNC_PERIPH_D,
105 int atmel_pio4_set_e_periph(u32 port, u32 pin, u32 config)
107 return atmel_pio4_config_io_func(port, pin,
108 ATMEL_PIO_CFGR_FUNC_PERIPH_E,
112 int atmel_pio4_set_f_periph(u32 port, u32 pin, u32 config)
114 return atmel_pio4_config_io_func(port, pin,
115 ATMEL_PIO_CFGR_FUNC_PERIPH_F,
119 int atmel_pio4_set_g_periph(u32 port, u32 pin, u32 config)
121 return atmel_pio4_config_io_func(port, pin,
122 ATMEL_PIO_CFGR_FUNC_PERIPH_G,
126 int atmel_pio4_set_pio_output(u32 port, u32 pin, u32 value)
128 struct atmel_pio4_port *port_base;
131 if (pin >= ATMEL_PIO_NPINS_PER_BANK)
134 port_base = atmel_pio4_port_base(port);
139 reg = ATMEL_PIO_CFGR_FUNC_GPIO | ATMEL_PIO_DIR_MASK;
141 writel(mask, &port_base->mskr);
142 writel(reg, &port_base->cfgr);
145 writel(mask, &port_base->sodr);
147 writel(mask, &port_base->codr);
152 int atmel_pio4_get_pio_input(u32 port, u32 pin)
154 struct atmel_pio4_port *port_base;
157 if (pin >= ATMEL_PIO_NPINS_PER_BANK)
160 port_base = atmel_pio4_port_base(port);
165 reg = ATMEL_PIO_CFGR_FUNC_GPIO;
167 writel(mask, &port_base->mskr);
168 writel(reg, &port_base->cfgr);
170 return (readl(&port_base->pdsr) & mask) ? 1 : 0;
173 #if CONFIG_IS_ENABLED(DM_GPIO)
175 struct atmel_pioctrl_data {
179 struct atmel_pio4_platdata {
180 struct atmel_pio4_port *reg_base;
183 static struct atmel_pio4_port *atmel_pio4_bank_base(struct udevice *dev,
186 struct atmel_pio4_platdata *plat = dev_get_platdata(dev);
187 struct atmel_pio4_port *port_base =
188 (struct atmel_pio4_port *)((u32)plat->reg_base +
189 ATMEL_PIO_BANK_OFFSET * bank);
194 static int atmel_pio4_direction_input(struct udevice *dev, unsigned offset)
196 u32 bank = ATMEL_PIO_BANK(offset);
197 u32 line = ATMEL_PIO_LINE(offset);
198 struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank);
199 u32 mask = BIT(line);
201 writel(mask, &port_base->mskr);
203 clrbits_le32(&port_base->cfgr,
204 ATMEL_PIO_CFGR_FUNC_MASK | ATMEL_PIO_DIR_MASK);
209 static int atmel_pio4_direction_output(struct udevice *dev,
210 unsigned offset, int value)
212 u32 bank = ATMEL_PIO_BANK(offset);
213 u32 line = ATMEL_PIO_LINE(offset);
214 struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank);
215 u32 mask = BIT(line);
217 writel(mask, &port_base->mskr);
219 clrsetbits_le32(&port_base->cfgr,
220 ATMEL_PIO_CFGR_FUNC_MASK, ATMEL_PIO_DIR_MASK);
223 writel(mask, &port_base->sodr);
225 writel(mask, &port_base->codr);
230 static int atmel_pio4_get_value(struct udevice *dev, unsigned offset)
232 u32 bank = ATMEL_PIO_BANK(offset);
233 u32 line = ATMEL_PIO_LINE(offset);
234 struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank);
235 u32 mask = BIT(line);
237 return (readl(&port_base->pdsr) & mask) ? 1 : 0;
240 static int atmel_pio4_set_value(struct udevice *dev,
241 unsigned offset, int value)
243 u32 bank = ATMEL_PIO_BANK(offset);
244 u32 line = ATMEL_PIO_LINE(offset);
245 struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank);
246 u32 mask = BIT(line);
249 writel(mask, &port_base->sodr);
251 writel(mask, &port_base->codr);
256 static int atmel_pio4_get_function(struct udevice *dev, unsigned offset)
258 u32 bank = ATMEL_PIO_BANK(offset);
259 u32 line = ATMEL_PIO_LINE(offset);
260 struct atmel_pio4_port *port_base = atmel_pio4_bank_base(dev, bank);
261 u32 mask = BIT(line);
263 writel(mask, &port_base->mskr);
265 return (readl(&port_base->cfgr) &
266 ATMEL_PIO_DIR_MASK) ? GPIOF_OUTPUT : GPIOF_INPUT;
269 static const struct dm_gpio_ops atmel_pio4_ops = {
270 .direction_input = atmel_pio4_direction_input,
271 .direction_output = atmel_pio4_direction_output,
272 .get_value = atmel_pio4_get_value,
273 .set_value = atmel_pio4_set_value,
274 .get_function = atmel_pio4_get_function,
277 static int atmel_pio4_bind(struct udevice *dev)
279 return dm_scan_fdt_dev(dev);
282 static int atmel_pio4_probe(struct udevice *dev)
284 struct atmel_pio4_platdata *plat = dev_get_platdata(dev);
285 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
286 struct atmel_pioctrl_data *pioctrl_data;
288 fdt_addr_t addr_base;
292 ret = clk_get_by_index(dev, 0, &clk);
296 ret = clk_enable(&clk);
302 addr_base = dev_read_addr(dev);
303 if (addr_base == FDT_ADDR_T_NONE)
306 plat->reg_base = (struct atmel_pio4_port *)addr_base;
308 pioctrl_data = (struct atmel_pioctrl_data *)dev_get_driver_data(dev);
309 nbanks = pioctrl_data->nbanks;
311 uc_priv->bank_name = fdt_get_name(gd->fdt_blob, dev_of_offset(dev),
313 uc_priv->gpio_count = nbanks * ATMEL_PIO_NPINS_PER_BANK;
319 * The number of banks can be different from a SoC to another one.
320 * We can have up to 16 banks.
322 static const struct atmel_pioctrl_data atmel_sama5d2_pioctrl_data = {
326 static const struct udevice_id atmel_pio4_ids[] = {
328 .compatible = "atmel,sama5d2-gpio",
329 .data = (ulong)&atmel_sama5d2_pioctrl_data,
334 U_BOOT_DRIVER(gpio_atmel_pio4) = {
335 .name = "gpio_atmel_pio4",
337 .ops = &atmel_pio4_ops,
338 .probe = atmel_pio4_probe,
339 .bind = atmel_pio4_bind,
340 .of_match = atmel_pio4_ids,
341 .platdata_auto_alloc_size = sizeof(struct atmel_pio4_platdata),