root / hw / omap_uart.c @ 37f32f0f
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1 | 02d74341 | cmchao | /*
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2 | 02d74341 | cmchao | * TI OMAP processors UART emulation.
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3 | 02d74341 | cmchao | *
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4 | 02d74341 | cmchao | * Copyright (C) 2006-2008 Andrzej Zaborowski <balrog@zabor.org>
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5 | 02d74341 | cmchao | * Copyright (C) 2007-2009 Nokia Corporation
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6 | 02d74341 | cmchao | *
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7 | 02d74341 | cmchao | * This program is free software; you can redistribute it and/or
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8 | 02d74341 | cmchao | * modify it under the terms of the GNU General Public License as
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9 | 02d74341 | cmchao | * published by the Free Software Foundation; either version 2 or
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10 | 02d74341 | cmchao | * (at your option) version 3 of the License.
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11 | 02d74341 | cmchao | *
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12 | 02d74341 | cmchao | * This program is distributed in the hope that it will be useful,
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13 | 02d74341 | cmchao | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | 02d74341 | cmchao | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | 02d74341 | cmchao | * GNU General Public License for more details.
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16 | 02d74341 | cmchao | *
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17 | 02d74341 | cmchao | * You should have received a copy of the GNU General Public License along
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18 | 02d74341 | cmchao | * with this program; if not, see <http://www.gnu.org/licenses/>.
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19 | 02d74341 | cmchao | */
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20 | 02d74341 | cmchao | #include "qemu-char.h" |
21 | 02d74341 | cmchao | #include "hw.h" |
22 | 02d74341 | cmchao | #include "omap.h" |
23 | 02d74341 | cmchao | /* We use pc-style serial ports. */
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24 | 02d74341 | cmchao | #include "pc.h" |
25 | 39186d8a | Richard Henderson | #include "exec-memory.h" |
26 | 02d74341 | cmchao | |
27 | 02d74341 | cmchao | /* UARTs */
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28 | 02d74341 | cmchao | struct omap_uart_s {
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29 | aee39503 | Avi Kivity | MemoryRegion iomem; |
30 | 02d74341 | cmchao | target_phys_addr_t base; |
31 | 02d74341 | cmchao | SerialState *serial; /* TODO */
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32 | 02d74341 | cmchao | struct omap_target_agent_s *ta;
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33 | 02d74341 | cmchao | omap_clk fclk; |
34 | 02d74341 | cmchao | qemu_irq irq; |
35 | 02d74341 | cmchao | |
36 | 02d74341 | cmchao | uint8_t eblr; |
37 | 02d74341 | cmchao | uint8_t syscontrol; |
38 | 02d74341 | cmchao | uint8_t wkup; |
39 | 02d74341 | cmchao | uint8_t cfps; |
40 | 02d74341 | cmchao | uint8_t mdr[2];
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41 | 02d74341 | cmchao | uint8_t scr; |
42 | 02d74341 | cmchao | uint8_t clksel; |
43 | 02d74341 | cmchao | }; |
44 | 02d74341 | cmchao | |
45 | 02d74341 | cmchao | void omap_uart_reset(struct omap_uart_s *s) |
46 | 02d74341 | cmchao | { |
47 | 02d74341 | cmchao | s->eblr = 0x00;
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48 | 02d74341 | cmchao | s->syscontrol = 0;
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49 | 02d74341 | cmchao | s->wkup = 0x3f;
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50 | 02d74341 | cmchao | s->cfps = 0x69;
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51 | 02d74341 | cmchao | s->clksel = 0;
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52 | 02d74341 | cmchao | } |
53 | 02d74341 | cmchao | |
54 | 02d74341 | cmchao | struct omap_uart_s *omap_uart_init(target_phys_addr_t base,
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55 | 02d74341 | cmchao | qemu_irq irq, omap_clk fclk, omap_clk iclk, |
56 | 6a8aabd3 | Stefan Weil | qemu_irq txdma, qemu_irq rxdma, |
57 | 6a8aabd3 | Stefan Weil | const char *label, CharDriverState *chr) |
58 | 02d74341 | cmchao | { |
59 | 02d74341 | cmchao | struct omap_uart_s *s = (struct omap_uart_s *) |
60 | 7267c094 | Anthony Liguori | g_malloc0(sizeof(struct omap_uart_s)); |
61 | 02d74341 | cmchao | |
62 | 02d74341 | cmchao | s->base = base; |
63 | 02d74341 | cmchao | s->fclk = fclk; |
64 | 02d74341 | cmchao | s->irq = irq; |
65 | 39186d8a | Richard Henderson | s->serial = serial_mm_init(get_system_memory(), base, 2, irq,
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66 | 39186d8a | Richard Henderson | omap_clk_getrate(fclk)/16,
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67 | 2ff0c7c3 | Richard Henderson | chr ?: qemu_chr_new(label, "null", NULL), |
68 | fb50cfe4 | Richard Henderson | DEVICE_NATIVE_ENDIAN); |
69 | 02d74341 | cmchao | return s;
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70 | 02d74341 | cmchao | } |
71 | 02d74341 | cmchao | |
72 | aee39503 | Avi Kivity | static uint64_t omap_uart_read(void *opaque, target_phys_addr_t addr, |
73 | aee39503 | Avi Kivity | unsigned size)
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74 | 02d74341 | cmchao | { |
75 | 02d74341 | cmchao | struct omap_uart_s *s = (struct omap_uart_s *) opaque; |
76 | 02d74341 | cmchao | |
77 | aee39503 | Avi Kivity | if (size == 4) { |
78 | aee39503 | Avi Kivity | return omap_badwidth_read8(opaque, addr);
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79 | aee39503 | Avi Kivity | } |
80 | aee39503 | Avi Kivity | |
81 | 02d74341 | cmchao | switch (addr) {
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82 | 02d74341 | cmchao | case 0x20: /* MDR1 */ |
83 | 02d74341 | cmchao | return s->mdr[0]; |
84 | 02d74341 | cmchao | case 0x24: /* MDR2 */ |
85 | 02d74341 | cmchao | return s->mdr[1]; |
86 | 02d74341 | cmchao | case 0x40: /* SCR */ |
87 | 02d74341 | cmchao | return s->scr;
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88 | 02d74341 | cmchao | case 0x44: /* SSR */ |
89 | 02d74341 | cmchao | return 0x0; |
90 | 02d74341 | cmchao | case 0x48: /* EBLR (OMAP2) */ |
91 | 02d74341 | cmchao | return s->eblr;
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92 | 02d74341 | cmchao | case 0x4C: /* OSC_12M_SEL (OMAP1) */ |
93 | 02d74341 | cmchao | return s->clksel;
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94 | 02d74341 | cmchao | case 0x50: /* MVR */ |
95 | 02d74341 | cmchao | return 0x30; |
96 | 02d74341 | cmchao | case 0x54: /* SYSC (OMAP2) */ |
97 | 02d74341 | cmchao | return s->syscontrol;
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98 | 02d74341 | cmchao | case 0x58: /* SYSS (OMAP2) */ |
99 | 02d74341 | cmchao | return 1; |
100 | 02d74341 | cmchao | case 0x5c: /* WER (OMAP2) */ |
101 | 02d74341 | cmchao | return s->wkup;
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102 | 02d74341 | cmchao | case 0x60: /* CFPS (OMAP2) */ |
103 | 02d74341 | cmchao | return s->cfps;
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104 | 02d74341 | cmchao | } |
105 | 02d74341 | cmchao | |
106 | 02d74341 | cmchao | OMAP_BAD_REG(addr); |
107 | 02d74341 | cmchao | return 0; |
108 | 02d74341 | cmchao | } |
109 | 02d74341 | cmchao | |
110 | 02d74341 | cmchao | static void omap_uart_write(void *opaque, target_phys_addr_t addr, |
111 | aee39503 | Avi Kivity | uint64_t value, unsigned size)
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112 | 02d74341 | cmchao | { |
113 | 02d74341 | cmchao | struct omap_uart_s *s = (struct omap_uart_s *) opaque; |
114 | 02d74341 | cmchao | |
115 | aee39503 | Avi Kivity | if (size == 4) { |
116 | aee39503 | Avi Kivity | return omap_badwidth_write8(opaque, addr, value);
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117 | aee39503 | Avi Kivity | } |
118 | aee39503 | Avi Kivity | |
119 | 02d74341 | cmchao | switch (addr) {
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120 | 02d74341 | cmchao | case 0x20: /* MDR1 */ |
121 | 02d74341 | cmchao | s->mdr[0] = value & 0x7f; |
122 | 02d74341 | cmchao | break;
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123 | 02d74341 | cmchao | case 0x24: /* MDR2 */ |
124 | 02d74341 | cmchao | s->mdr[1] = value & 0xff; |
125 | 02d74341 | cmchao | break;
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126 | 02d74341 | cmchao | case 0x40: /* SCR */ |
127 | 02d74341 | cmchao | s->scr = value & 0xff;
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128 | 02d74341 | cmchao | break;
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129 | 02d74341 | cmchao | case 0x48: /* EBLR (OMAP2) */ |
130 | 02d74341 | cmchao | s->eblr = value & 0xff;
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131 | 02d74341 | cmchao | break;
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132 | 02d74341 | cmchao | case 0x4C: /* OSC_12M_SEL (OMAP1) */ |
133 | 02d74341 | cmchao | s->clksel = value & 1;
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134 | 02d74341 | cmchao | break;
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135 | 02d74341 | cmchao | case 0x44: /* SSR */ |
136 | 02d74341 | cmchao | case 0x50: /* MVR */ |
137 | 02d74341 | cmchao | case 0x58: /* SYSS (OMAP2) */ |
138 | 02d74341 | cmchao | OMAP_RO_REG(addr); |
139 | 02d74341 | cmchao | break;
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140 | 02d74341 | cmchao | case 0x54: /* SYSC (OMAP2) */ |
141 | 02d74341 | cmchao | s->syscontrol = value & 0x1d;
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142 | 02d74341 | cmchao | if (value & 2) |
143 | 02d74341 | cmchao | omap_uart_reset(s); |
144 | 02d74341 | cmchao | break;
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145 | 02d74341 | cmchao | case 0x5c: /* WER (OMAP2) */ |
146 | 02d74341 | cmchao | s->wkup = value & 0x7f;
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147 | 02d74341 | cmchao | break;
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148 | 02d74341 | cmchao | case 0x60: /* CFPS (OMAP2) */ |
149 | 02d74341 | cmchao | s->cfps = value & 0xff;
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150 | 02d74341 | cmchao | break;
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151 | 02d74341 | cmchao | default:
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152 | 02d74341 | cmchao | OMAP_BAD_REG(addr); |
153 | 02d74341 | cmchao | } |
154 | 02d74341 | cmchao | } |
155 | 02d74341 | cmchao | |
156 | aee39503 | Avi Kivity | static const MemoryRegionOps omap_uart_ops = { |
157 | aee39503 | Avi Kivity | .read = omap_uart_read, |
158 | aee39503 | Avi Kivity | .write = omap_uart_write, |
159 | aee39503 | Avi Kivity | .endianness = DEVICE_NATIVE_ENDIAN, |
160 | 02d74341 | cmchao | }; |
161 | 02d74341 | cmchao | |
162 | aee39503 | Avi Kivity | struct omap_uart_s *omap2_uart_init(MemoryRegion *sysmem,
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163 | aee39503 | Avi Kivity | struct omap_target_agent_s *ta,
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164 | 02d74341 | cmchao | qemu_irq irq, omap_clk fclk, omap_clk iclk, |
165 | 6a8aabd3 | Stefan Weil | qemu_irq txdma, qemu_irq rxdma, |
166 | 6a8aabd3 | Stefan Weil | const char *label, CharDriverState *chr) |
167 | 02d74341 | cmchao | { |
168 | f44336c5 | Avi Kivity | target_phys_addr_t base = omap_l4_attach(ta, 0, NULL); |
169 | 02d74341 | cmchao | struct omap_uart_s *s = omap_uart_init(base, irq,
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170 | 6a8aabd3 | Stefan Weil | fclk, iclk, txdma, rxdma, label, chr); |
171 | aee39503 | Avi Kivity | |
172 | aee39503 | Avi Kivity | memory_region_init_io(&s->iomem, &omap_uart_ops, s, "omap.uart", 0x100); |
173 | 02d74341 | cmchao | |
174 | 02d74341 | cmchao | s->ta = ta; |
175 | 02d74341 | cmchao | |
176 | aee39503 | Avi Kivity | memory_region_add_subregion(sysmem, base + 0x20, &s->iomem);
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177 | 02d74341 | cmchao | |
178 | 02d74341 | cmchao | return s;
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179 | 02d74341 | cmchao | } |
180 | 02d74341 | cmchao | |
181 | 02d74341 | cmchao | void omap_uart_attach(struct omap_uart_s *s, CharDriverState *chr) |
182 | 02d74341 | cmchao | { |
183 | 02d74341 | cmchao | /* TODO: Should reuse or destroy current s->serial */
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184 | 39186d8a | Richard Henderson | s->serial = serial_mm_init(get_system_memory(), s->base, 2, s->irq,
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185 | 02d74341 | cmchao | omap_clk_getrate(s->fclk) / 16,
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186 | 2ff0c7c3 | Richard Henderson | chr ?: qemu_chr_new("null", "null", NULL), |
187 | fb50cfe4 | Richard Henderson | DEVICE_NATIVE_ENDIAN); |
188 | 02d74341 | cmchao | } |