1 /*
2 * Copyright (c) 2023 Antmicro <www.antmicro.com>
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #define DT_DRV_COMPAT renesas_rzt2m_pinctrl
8
9 #include <zephyr/arch/cpu.h>
10 #include <zephyr/drivers/pinctrl.h>
11 #include <soc.h>
12
13 #define PORT_NSR DT_INST_REG_ADDR_BY_NAME(0, port_nsr)
14 #define PTADR DT_INST_REG_ADDR_BY_NAME(0, ptadr)
15
16 /* Port m mode control register */
17 #define PMC(port) (PORT_NSR + 0x400 + port)
18 /* Port m function control register */
19 #define PFC(port) (PORT_NSR + 0x600 + (0x4 * port))
20 /* IO Buffer m function switching register */
21 #define DRCTL(port, pin) (PORT_NSR + 0xa00 + (0x8 * port) + pin)
22 /* Port m region select register */
23 #define RSELP(port) (PTADR + port)
24
25 #define DRCTL_DRIVE_STRENGTH(val) (val & 0x3)
26 #define DRCTL_PULL_UP_DOWN(val) ((val & 0x3) << 2)
27 #define DRCTL_SCHMITT(val) ((val & 0x1) << 4)
28 #define DRCTL_SLEW_RATE(val) ((val & 0x1) << 5)
29 #define DRCTL_CONFIG(drive, pull, schmitt, slew) \
30 (DRCTL_DRIVE_STRENGTH(drive) | DRCTL_PULL_UP_DOWN(pull) | DRCTL_SCHMITT(schmitt) | \
31 DRCTL_SLEW_RATE(slew))
32 #define PFC_FUNC_MASK(pin) (0xf << (pin * 4))
33
pinctrl_configure_pin(const pinctrl_soc_pin_t * pin)34 static void pinctrl_configure_pin(const pinctrl_soc_pin_t *pin)
35 {
36 uint8_t rselp = sys_read8(RSELP(pin->port));
37 uint32_t pfc = sys_read32(PFC(pin->port)) & ~(PFC_FUNC_MASK(pin->pin));
38 uint8_t pmc = sys_read8(PMC(pin->port));
39
40 /* Set proper bit in the RSELP register to use as non-safety domain. */
41 sys_write8(rselp | BIT(pin->pin), RSELP(pin->port));
42 sys_write8(DRCTL_CONFIG(
43 pin->drive_strength, (pin->pull_up == 1 ? 1U : (pin->pull_down == 1 ? 2U : 0)),
44 pin->schmitt_enable, pin->slew_rate),
45 DRCTL(pin->port, pin->pin));
46
47 /* Select function for the pin. */
48 sys_write32(pfc | pin->func << (pin->pin * 4), PFC(pin->port));
49
50 /* Set proper bit in the PMC register to use the pin as a peripheral IO. */
51 sys_write8(pmc | BIT(pin->pin), PMC(pin->port));
52 }
53
pinctrl_configure_pins(const pinctrl_soc_pin_t * pins,uint8_t pin_cnt,uintptr_t reg)54 int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintptr_t reg)
55 {
56 ARG_UNUSED(reg);
57
58 for (uint8_t i = 0U; i < pin_cnt; i++) {
59 pinctrl_configure_pin(pins++);
60 }
61
62 return 0;
63 }
64
