FreeCalypso > hg > freecalypso-tools

annotate target-utils/libbase/spidrv.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents 3d73d4d3527f
children
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0
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1 /* Driver for SPI Master Controller inside TI Calypso */
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2 /* lifted from OsmocomBB and ported to FreeCalypso target-utils environment */
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3
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4 /* (C) 2010 by Harald Welte <laforge@gnumonks.org>
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5 *
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6 * All Rights Reserved
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7 *
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8 * This program is free software; you can redistribute it and/or modify
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9 * it under the terms of the GNU General Public License as published by
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10 * the Free Software Foundation; either version 2 of the License, or
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11 * (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful,
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14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 * GNU General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU General Public License along
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19 * with this program; if not, write to the Free Software Foundation, Inc.,
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20 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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21 *
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22 */
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23
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24 #include "types.h"
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25
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26 #define ASIC_CONF_REG (*(volatile u16 *) 0xFFFEF008)
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27
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28 struct spi_regs {
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29 u16 reg_set1;
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30 u16 reg_set2;
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31 u16 reg_ctrl;
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32 u16 reg_status;
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33 u16 reg_tx_lsb;
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34 u16 reg_tx_msb;
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35 u16 reg_rx_lsb;
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36 u16 reg_rx_msb;
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37 };
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38
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39 #define SPI_REGS (*(volatile struct spi_regs *) 0xFFFE3000)
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40
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41 #define BASE_ADDR_SPI 0xfffe3000
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42 #define SPI_REG(n) (BASE_ADDR_SPI+(n))
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43
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44 #define SPI_SET1_EN_CLK (1 << 0)
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45 #define SPI_SET1_WR_IRQ_DIS (1 << 4)
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46 #define SPI_SET1_RDWR_IRQ_DIS (1 << 5)
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47
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48 #define SPI_CTRL_RDWR (1 << 0)
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49 #define SPI_CTRL_WR (1 << 1)
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50 #define SPI_CTRL_NB_SHIFT 2
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51 #define SPI_CTRL_AD_SHIFT 7
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52
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53 #define SPI_STATUS_RE (1 << 0) /* Read End */
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54 #define SPI_STATUS_WE (1 << 1) /* Write End */
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55
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56 spi_init()
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57 {
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58 static int initdone;
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59
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60 if (initdone)
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61 return(0);
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62 ASIC_CONF_REG |= 0x6000;
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63 SPI_REGS.reg_set1 = SPI_SET1_EN_CLK | SPI_SET1_WR_IRQ_DIS |
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64 SPI_SET1_RDWR_IRQ_DIS;
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65 SPI_REGS.reg_set2 = 0x0001;
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66 initdone = 1;
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67 return(1);
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68 }
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69
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70 spi_xfer(dev_idx, bitlen, dout, din)
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71 void *dout, *din;
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72 {
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73 int bytes_per_xfer;
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74 u16 reg_status, reg_ctrl = 0;
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75 u32 tmp;
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76
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77 if (bitlen <= 0)
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78 return 0;
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79
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80 if (bitlen > 32)
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81 return -1;
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82
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83 if (dev_idx > 4)
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84 return -1;
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85
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86 bytes_per_xfer = bitlen / 8;
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87 if (bitlen % 8)
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88 bytes_per_xfer ++;
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89
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90 reg_ctrl |= (bitlen - 1) << SPI_CTRL_NB_SHIFT;
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91 reg_ctrl |= (dev_idx & 0x7) << SPI_CTRL_AD_SHIFT;
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92
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93 if (bitlen <= 8) {
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94 tmp = *(u8 *)dout;
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95 tmp <<= 24 + (8-bitlen); /* align to MSB */
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96 } else if (bitlen <= 16) {
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97 tmp = *(u16 *)dout;
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98 tmp <<= 16 + (16-bitlen); /* align to MSB */
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99 } else {
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100 tmp = *(u32 *)dout;
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101 tmp <<= (32-bitlen); /* align to MSB */
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102 }
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103
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104 /* fill transmit registers */
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105 SPI_REGS.reg_tx_msb = tmp >> 16;
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106 SPI_REGS.reg_tx_lsb = tmp;
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107
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108 /* initiate transfer */
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109 if (din)
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110 reg_ctrl |= SPI_CTRL_RDWR;
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111 else
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112 reg_ctrl |= SPI_CTRL_WR;
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113 SPI_REGS.reg_ctrl = reg_ctrl;
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114
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diff changeset
115 /* wait until the transfer is complete */
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 while (1) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 reg_status = SPI_REGS.reg_status;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 if (din && (reg_status & SPI_STATUS_RE))
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 break;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 else if (reg_status & SPI_STATUS_WE)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 break;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 }
496
3d73d4d3527f target-utils: removed osmo_delay_ms() from ABB access code
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
123 /* delay of seven 13MHz cycles */
3d73d4d3527f target-utils: removed osmo_delay_ms() from ABB access code
Mychaela Falconia <falcon@freecalypso.org>
parents: 0
diff changeset
124 wait_ARM_cycles(7);
0
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 if (din) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 tmp = SPI_REGS.reg_rx_msb << 16;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 tmp |= SPI_REGS.reg_rx_lsb;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 if (bitlen <= 8)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 *(u8 *)din = tmp & 0xff;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 else if (bitlen <= 16)
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 *(u16 *)din = tmp & 0xffff;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 else
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 *(u32 *)din = tmp;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 return 0;
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 }