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