1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2011 by Vladimir Zapolskiy <vz@mleia.com>
4 */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <ns16550.h>
9 #include <dm/platform_data/lpc32xx_hsuart.h>
10
11 #include <asm/arch/clk.h>
12 #include <asm/arch/uart.h>
13 #include <asm/arch/mux.h>
14 #include <asm/io.h>
15
16 static struct clk_pm_regs *clk = (struct clk_pm_regs *)CLK_PM_BASE;
17 static struct uart_ctrl_regs *ctrl = (struct uart_ctrl_regs *)UART_CTRL_BASE;
18 static struct mux_regs *mux = (struct mux_regs *)MUX_BASE;
19
lpc32xx_uart_init(unsigned int uart_id)20 void lpc32xx_uart_init(unsigned int uart_id)
21 {
22 if (uart_id < 1 || uart_id > 7)
23 return;
24
25 /* Disable loopback mode, if it is set by S1L bootloader */
26 clrbits_le32(&ctrl->loop,
27 UART_LOOPBACK(CONFIG_SYS_LPC32XX_UART));
28
29 if (uart_id < 3 || uart_id > 6)
30 return;
31
32 /* Enable UART system clock */
33 setbits_le32(&clk->uartclk_ctrl, CLK_UART(uart_id));
34
35 /* Set UART into autoclock mode */
36 clrsetbits_le32(&ctrl->clkmode,
37 UART_CLKMODE_MASK(uart_id),
38 UART_CLKMODE_AUTO(uart_id));
39
40 /* Bypass pre-divider of UART clock */
41 writel(CLK_UART_X_DIV(1) | CLK_UART_Y_DIV(1),
42 &clk->u3clk + (uart_id - 3));
43 }
44
45 #if !CONFIG_IS_ENABLED(OF_CONTROL)
46 static const struct ns16550_platdata lpc32xx_uart[] = {
47 { .base = UART3_BASE, .reg_shift = 2,
48 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
49 { .base = UART4_BASE, .reg_shift = 2,
50 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
51 { .base = UART5_BASE, .reg_shift = 2,
52 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
53 { .base = UART6_BASE, .reg_shift = 2,
54 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
55 };
56
57 #if defined(CONFIG_LPC32XX_HSUART)
58 static const struct lpc32xx_hsuart_platdata lpc32xx_hsuart[] = {
59 { HS_UART1_BASE, },
60 { HS_UART2_BASE, },
61 { HS_UART7_BASE, },
62 };
63 #endif
64
65 U_BOOT_DEVICES(lpc32xx_uarts) = {
66 #if defined(CONFIG_LPC32XX_HSUART)
67 { "lpc32xx_hsuart", &lpc32xx_hsuart[0], },
68 { "lpc32xx_hsuart", &lpc32xx_hsuart[1], },
69 #endif
70 { "ns16550_serial", &lpc32xx_uart[0], },
71 { "ns16550_serial", &lpc32xx_uart[1], },
72 { "ns16550_serial", &lpc32xx_uart[2], },
73 { "ns16550_serial", &lpc32xx_uart[3], },
74 #if defined(CONFIG_LPC32XX_HSUART)
75 { "lpc32xx_hsuart", &lpc32xx_hsuart[2], },
76 #endif
77 };
78 #endif
79
lpc32xx_dma_init(void)80 void lpc32xx_dma_init(void)
81 {
82 /* Enable DMA interface */
83 writel(CLK_DMA_ENABLE, &clk->dmaclk_ctrl);
84 }
85
lpc32xx_mac_init(void)86 void lpc32xx_mac_init(void)
87 {
88 /* Enable MAC interface */
89 writel(CLK_MAC_REG | CLK_MAC_SLAVE | CLK_MAC_MASTER
90 #if defined(CONFIG_RMII)
91 | CLK_MAC_RMII,
92 #else
93 | CLK_MAC_MII,
94 #endif
95 &clk->macclk_ctrl);
96 }
97
lpc32xx_mlc_nand_init(void)98 void lpc32xx_mlc_nand_init(void)
99 {
100 /* Enable NAND interface */
101 writel(CLK_NAND_MLC | CLK_NAND_MLC_INT, &clk->flashclk_ctrl);
102 }
103
lpc32xx_slc_nand_init(void)104 void lpc32xx_slc_nand_init(void)
105 {
106 /* Enable SLC NAND interface */
107 writel(CLK_NAND_SLC | CLK_NAND_SLC_SELECT, &clk->flashclk_ctrl);
108 }
109
lpc32xx_usb_init(void)110 void lpc32xx_usb_init(void)
111 {
112 /* Do not route the UART 5 Tx/Rx pins to the USB D+ and USB D- pins. */
113 clrbits_le32(&ctrl->ctrl, UART_CTRL_UART5_USB_MODE);
114 }
115
lpc32xx_i2c_init(unsigned int devnum)116 void lpc32xx_i2c_init(unsigned int devnum)
117 {
118 /* Enable I2C interface */
119 uint32_t ctrl = readl(&clk->i2cclk_ctrl);
120 if (devnum == 1)
121 ctrl |= CLK_I2C1_ENABLE;
122 if (devnum == 2)
123 ctrl |= CLK_I2C2_ENABLE;
124 writel(ctrl, &clk->i2cclk_ctrl);
125 }
126
127 U_BOOT_DEVICE(lpc32xx_gpios) = {
128 .name = "gpio_lpc32xx"
129 };
130
131 /* Mux for SCK0, MISO0, MOSI0. We do not use SSEL0. */
132
133 #define P_MUX_SET_SSP0 0x1600
134
lpc32xx_ssp_init(void)135 void lpc32xx_ssp_init(void)
136 {
137 /* Enable SSP0 interface */
138 writel(CLK_SSP0_ENABLE_CLOCK, &clk->ssp_ctrl);
139 /* Mux SSP0 pins */
140 writel(P_MUX_SET_SSP0, &mux->p_mux_set);
141 }
142