2 * Copyright (c) 2008, Google Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
14 * * Neither the name of Google, Inc. nor the names of its contributors
15 * may be used to endorse or promote products derived from this
16 * software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <platform/iomap.h>
38 #define UART_MR1 0x0000
40 #define UART_MR1_AUTO_RFR_LEVEL0(n) (((n) & 0x3f) << 8)
41 #define UART_MR1_RX_RDY_CTL (1 << 7)
42 #define UART_MR1_CTS_CTL (1 << 6)
43 #define UART_MR1_AUTO_RFR_LEVEL1(n) ((n) & 0x3f)
45 #define UART_MR2 0x0004
46 #define UART_MR2_ERROR_MODE (1 << 6)
47 #define UART_MR2_BITS_PER_CHAR_5 (0 << 4)
48 #define UART_MR2_BITS_PER_CHAR_6 (1 << 4)
49 #define UART_MR2_BITS_PER_CHAR_7 (2 << 4)
50 #define UART_MR2_BITS_PER_CHAR_8 (3 << 4)
51 #define UART_MR2_STOP_BIT_LEN_0563 (0 << 2)
52 #define UART_MR2_STOP_BIT_LEN_1000 (1 << 2)
53 #define UART_MR2_STOP_BIT_LEN_1563 (2 << 2)
54 #define UART_MR2_STOP_BIT_LEN_2000 (3 << 2)
55 #define UART_MR2_PARITY_MODE_NONE (0)
56 #define UART_MR2_PARITY_MODE_ODD (1)
57 #define UART_MR2_PARITY_MODE_EVEN (2)
58 #define UART_MR2_PARITY_MODE_SPACE (3)
60 #define UART_CSR 0x0008
61 #define UART_CSR_115200 0xFF
62 #define UART_CSR_57600 0xEE
63 #define UART_CSR_38400 0xDD
64 #define UART_CSR_19200 0xBB
66 #define UART_TF 0x000C
68 #define UART_CR 0x0010
69 #define UART_CR_CMD_NULL (0 << 4)
70 #define UART_CR_CMD_RESET_RX (1 << 4)
71 #define UART_CR_CMD_RESET_TX (2 << 4)
72 #define UART_CR_CMD_RESET_ERR (3 << 4)
73 #define UART_CR_CMD_RESET_BCI (4 << 4)
74 #define UART_CR_CMD_START_BREAK (5 << 4)
75 #define UART_CR_CMD_STOP_BREAK (6 << 4)
76 #define UART_CR_CMD_RESET_CTS_N (7 << 4)
77 #define UART_CR_CMD_PACKET_MODE (9 << 4)
78 #define UART_CR_CMD_MODE_RESET (12<< 4)
79 #define UART_CR_CMD_SET_RFR_N (13<< 4)
80 #define UART_CR_CMD_RESET_RFR_ND (14<< 4)
81 #define UART_CR_TX_DISABLE (1 << 3)
82 #define UART_CR_TX_ENABLE (1 << 3)
83 #define UART_CR_RX_DISABLE (1 << 3)
84 #define UART_CR_RX_ENABLE (1 << 3)
86 #define UART_IMR 0x0014
87 #define UART_IMR_RXLEV (1 << 4)
88 #define UART_IMR_TXLEV (1 << 0)
90 #define UART_IPR 0x0018
91 #define UART_TFWR 0x001C
92 #define UART_RFWR 0x0020
93 #define UART_HCR 0x0024
95 #define UART_MREG 0x0028
96 #define UART_NREG 0x002C
97 #define UART_DREG 0x0030
98 #define UART_MNDREG 0x0034
99 #define UART_IRDA 0x0038
100 #define UART_MISR_MODE 0x0040
101 #define UART_MISR_RESET 0x0044
102 #define UART_MISR_EXPORT 0x0048
103 #define UART_MISR_VAL 0x004C
104 #define UART_TEST_CTRL 0x0050
106 #define UART_SR 0x0008
107 #define UART_SR_HUNT_CHAR (1 << 7)
108 #define UART_SR_RX_BREAK (1 << 6)
109 #define UART_SR_PAR_FRAME_ERR (1 << 5)
110 #define UART_SR_OVERRUN (1 << 4)
111 #define UART_SR_TX_EMPTY (1 << 3)
112 #define UART_SR_TX_READY (1 << 2)
113 #define UART_SR_RX_FULL (1 << 1)
114 #define UART_SR_RX_READY (1 << 0)
116 #define UART_RF 0x000C
117 #define UART_MISR 0x0010
118 #define UART_ISR 0x0014
120 static unsigned uart_ready = 0;
122 static unsigned uart_base = MSM_UART2_BASE;
124 static unsigned uart_base = MSM_UART3_BASE;
127 #define uwr(v,a) writel(v, uart_base + (a))
128 #define urd(a) readl(uart_base + (a))
132 uwr(0x0A, UART_CR); /* disable TX and RX */
134 uwr(0x30, UART_CR); /* reset error status */
135 uwr(0x10, UART_CR); /* reset receiver */
136 uwr(0x20, UART_CR); /* reset transmitter */
138 #if PLATFORM_QSD8K || PLATFORM_MSM7X30
140 uwr(0x06, UART_MREG);
141 uwr(0xF1, UART_NREG);
142 uwr(0x0F, UART_DREG);
143 uwr(0x1A, UART_MNDREG);
146 uwr(0xC0, UART_MREG);
147 uwr(0xAF, UART_NREG);
148 uwr(0x80, UART_DREG);
149 uwr(0x19, UART_MNDREG);
152 uwr(0x10, UART_CR); /* reset RX */
153 uwr(0x20, UART_CR); /* reset TX */
154 uwr(0x30, UART_CR); /* reset error status */
155 uwr(0x40, UART_CR); /* reset RX break */
156 uwr(0x70, UART_CR); /* rest? */
157 uwr(0xD0, UART_CR); /* reset */
159 uwr(0x7BF, UART_IPR); /* stale timeout = 630 * bitrate */
161 uwr(115, UART_RFWR); /* RX watermark = 58 * 2 - 1 */
162 uwr(10, UART_TFWR); /* TX watermark */
166 uwr(UART_CSR_115200, UART_CSR);
169 // uwr(0x7F4, UART_MR1); /* RFS/ CTS/ 500chr RFR */
171 uwr(0x34, UART_MR2); /* 8N1 */
173 uwr(0x05, UART_CR); /* enable TX & RX */
178 static int _uart_putc(int port, char c)
182 while (!(urd(UART_SR) & UART_SR_TX_READY)) ;
187 int uart_putc(int port, char c)
195 int uart_getc(int port, bool wait)
199 while (!(urd(UART_SR) & UART_SR_RX_READY))