cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 1 | /* |
| 2 | * TI OMAP processors UART emulation. |
| 3 | * |
| 4 | * Copyright (C) 2006-2008 Andrzej Zaborowski <balrog@zabor.org> |
| 5 | * Copyright (C) 2007-2009 Nokia Corporation |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License as |
| 9 | * published by the Free Software Foundation; either version 2 or |
| 10 | * (at your option) version 3 of the License. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
Paolo Bonzini | dccfcd0 | 2013-04-08 16:55:25 +0200 | [diff] [blame] | 20 | #include "sysemu/char.h" |
Paolo Bonzini | 83c9f4c | 2013-02-04 15:40:22 +0100 | [diff] [blame] | 21 | #include "hw/hw.h" |
Paolo Bonzini | 0d09e41 | 2013-02-05 17:06:20 +0100 | [diff] [blame] | 22 | #include "hw/arm/omap.h" |
| 23 | #include "hw/char/serial.h" |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 24 | #include "exec/address-spaces.h" |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 25 | |
| 26 | /* UARTs */ |
| 27 | struct omap_uart_s { |
Avi Kivity | aee3950 | 2011-11-22 15:06:46 +0200 | [diff] [blame] | 28 | MemoryRegion iomem; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 29 | hwaddr base; |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 30 | SerialState *serial; /* TODO */ |
| 31 | struct omap_target_agent_s *ta; |
| 32 | omap_clk fclk; |
| 33 | qemu_irq irq; |
| 34 | |
| 35 | uint8_t eblr; |
| 36 | uint8_t syscontrol; |
| 37 | uint8_t wkup; |
| 38 | uint8_t cfps; |
| 39 | uint8_t mdr[2]; |
| 40 | uint8_t scr; |
| 41 | uint8_t clksel; |
| 42 | }; |
| 43 | |
| 44 | void omap_uart_reset(struct omap_uart_s *s) |
| 45 | { |
| 46 | s->eblr = 0x00; |
| 47 | s->syscontrol = 0; |
| 48 | s->wkup = 0x3f; |
| 49 | s->cfps = 0x69; |
| 50 | s->clksel = 0; |
| 51 | } |
| 52 | |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 53 | struct omap_uart_s *omap_uart_init(hwaddr base, |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 54 | qemu_irq irq, omap_clk fclk, omap_clk iclk, |
Stefan Weil | 6a8aabd | 2010-08-08 14:09:26 +0200 | [diff] [blame] | 55 | qemu_irq txdma, qemu_irq rxdma, |
| 56 | const char *label, CharDriverState *chr) |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 57 | { |
| 58 | struct omap_uart_s *s = (struct omap_uart_s *) |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 59 | g_malloc0(sizeof(struct omap_uart_s)); |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 60 | |
| 61 | s->base = base; |
| 62 | s->fclk = fclk; |
| 63 | s->irq = irq; |
Richard Henderson | 39186d8 | 2011-08-11 16:07:16 -0700 | [diff] [blame] | 64 | s->serial = serial_mm_init(get_system_memory(), base, 2, irq, |
| 65 | omap_clk_getrate(fclk)/16, |
Richard Henderson | 2ff0c7c | 2011-08-11 16:07:15 -0700 | [diff] [blame] | 66 | chr ?: qemu_chr_new(label, "null", NULL), |
Richard Henderson | fb50cfe | 2011-08-11 16:07:14 -0700 | [diff] [blame] | 67 | DEVICE_NATIVE_ENDIAN); |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 68 | return s; |
| 69 | } |
| 70 | |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 71 | static uint64_t omap_uart_read(void *opaque, hwaddr addr, |
Avi Kivity | aee3950 | 2011-11-22 15:06:46 +0200 | [diff] [blame] | 72 | unsigned size) |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 73 | { |
| 74 | struct omap_uart_s *s = (struct omap_uart_s *) opaque; |
| 75 | |
Avi Kivity | aee3950 | 2011-11-22 15:06:46 +0200 | [diff] [blame] | 76 | if (size == 4) { |
| 77 | return omap_badwidth_read8(opaque, addr); |
| 78 | } |
| 79 | |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 80 | switch (addr) { |
| 81 | case 0x20: /* MDR1 */ |
| 82 | return s->mdr[0]; |
| 83 | case 0x24: /* MDR2 */ |
| 84 | return s->mdr[1]; |
| 85 | case 0x40: /* SCR */ |
| 86 | return s->scr; |
| 87 | case 0x44: /* SSR */ |
| 88 | return 0x0; |
| 89 | case 0x48: /* EBLR (OMAP2) */ |
| 90 | return s->eblr; |
| 91 | case 0x4C: /* OSC_12M_SEL (OMAP1) */ |
| 92 | return s->clksel; |
| 93 | case 0x50: /* MVR */ |
| 94 | return 0x30; |
| 95 | case 0x54: /* SYSC (OMAP2) */ |
| 96 | return s->syscontrol; |
| 97 | case 0x58: /* SYSS (OMAP2) */ |
| 98 | return 1; |
| 99 | case 0x5c: /* WER (OMAP2) */ |
| 100 | return s->wkup; |
| 101 | case 0x60: /* CFPS (OMAP2) */ |
| 102 | return s->cfps; |
| 103 | } |
| 104 | |
| 105 | OMAP_BAD_REG(addr); |
| 106 | return 0; |
| 107 | } |
| 108 | |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 109 | static void omap_uart_write(void *opaque, hwaddr addr, |
Avi Kivity | aee3950 | 2011-11-22 15:06:46 +0200 | [diff] [blame] | 110 | uint64_t value, unsigned size) |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 111 | { |
| 112 | struct omap_uart_s *s = (struct omap_uart_s *) opaque; |
| 113 | |
Avi Kivity | aee3950 | 2011-11-22 15:06:46 +0200 | [diff] [blame] | 114 | if (size == 4) { |
| 115 | return omap_badwidth_write8(opaque, addr, value); |
| 116 | } |
| 117 | |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 118 | switch (addr) { |
| 119 | case 0x20: /* MDR1 */ |
| 120 | s->mdr[0] = value & 0x7f; |
| 121 | break; |
| 122 | case 0x24: /* MDR2 */ |
| 123 | s->mdr[1] = value & 0xff; |
| 124 | break; |
| 125 | case 0x40: /* SCR */ |
| 126 | s->scr = value & 0xff; |
| 127 | break; |
| 128 | case 0x48: /* EBLR (OMAP2) */ |
| 129 | s->eblr = value & 0xff; |
| 130 | break; |
| 131 | case 0x4C: /* OSC_12M_SEL (OMAP1) */ |
| 132 | s->clksel = value & 1; |
| 133 | break; |
| 134 | case 0x44: /* SSR */ |
| 135 | case 0x50: /* MVR */ |
| 136 | case 0x58: /* SYSS (OMAP2) */ |
| 137 | OMAP_RO_REG(addr); |
| 138 | break; |
| 139 | case 0x54: /* SYSC (OMAP2) */ |
| 140 | s->syscontrol = value & 0x1d; |
| 141 | if (value & 2) |
| 142 | omap_uart_reset(s); |
| 143 | break; |
| 144 | case 0x5c: /* WER (OMAP2) */ |
| 145 | s->wkup = value & 0x7f; |
| 146 | break; |
| 147 | case 0x60: /* CFPS (OMAP2) */ |
| 148 | s->cfps = value & 0xff; |
| 149 | break; |
| 150 | default: |
| 151 | OMAP_BAD_REG(addr); |
| 152 | } |
| 153 | } |
| 154 | |
Avi Kivity | aee3950 | 2011-11-22 15:06:46 +0200 | [diff] [blame] | 155 | static const MemoryRegionOps omap_uart_ops = { |
| 156 | .read = omap_uart_read, |
| 157 | .write = omap_uart_write, |
| 158 | .endianness = DEVICE_NATIVE_ENDIAN, |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 159 | }; |
| 160 | |
Avi Kivity | aee3950 | 2011-11-22 15:06:46 +0200 | [diff] [blame] | 161 | struct omap_uart_s *omap2_uart_init(MemoryRegion *sysmem, |
| 162 | struct omap_target_agent_s *ta, |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 163 | qemu_irq irq, omap_clk fclk, omap_clk iclk, |
Stefan Weil | 6a8aabd | 2010-08-08 14:09:26 +0200 | [diff] [blame] | 164 | qemu_irq txdma, qemu_irq rxdma, |
| 165 | const char *label, CharDriverState *chr) |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 166 | { |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 167 | hwaddr base = omap_l4_attach(ta, 0, NULL); |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 168 | struct omap_uart_s *s = omap_uart_init(base, irq, |
Stefan Weil | 6a8aabd | 2010-08-08 14:09:26 +0200 | [diff] [blame] | 169 | fclk, iclk, txdma, rxdma, label, chr); |
Avi Kivity | aee3950 | 2011-11-22 15:06:46 +0200 | [diff] [blame] | 170 | |
Paolo Bonzini | 2c9b15c | 2013-06-06 05:41:28 -0400 | [diff] [blame] | 171 | memory_region_init_io(&s->iomem, NULL, &omap_uart_ops, s, "omap.uart", 0x100); |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 172 | |
| 173 | s->ta = ta; |
| 174 | |
Avi Kivity | aee3950 | 2011-11-22 15:06:46 +0200 | [diff] [blame] | 175 | memory_region_add_subregion(sysmem, base + 0x20, &s->iomem); |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 176 | |
| 177 | return s; |
| 178 | } |
| 179 | |
| 180 | void omap_uart_attach(struct omap_uart_s *s, CharDriverState *chr) |
| 181 | { |
| 182 | /* TODO: Should reuse or destroy current s->serial */ |
Richard Henderson | 39186d8 | 2011-08-11 16:07:16 -0700 | [diff] [blame] | 183 | s->serial = serial_mm_init(get_system_memory(), s->base, 2, s->irq, |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 184 | omap_clk_getrate(s->fclk) / 16, |
Richard Henderson | 2ff0c7c | 2011-08-11 16:07:15 -0700 | [diff] [blame] | 185 | chr ?: qemu_chr_new("null", "null", NULL), |
Richard Henderson | fb50cfe | 2011-08-11 16:07:14 -0700 | [diff] [blame] | 186 | DEVICE_NATIVE_ENDIAN); |
cmchao | 02d7434 | 2010-05-31 23:54:23 +0800 | [diff] [blame] | 187 | } |