Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 1 | /* ---------------------------------------------------------------------------- |
| 2 | * ATMEL Microcontroller Software Support |
| 3 | * ---------------------------------------------------------------------------- |
| 4 | * Copyright (c) 2009, Atmel Corporation |
| 5 | * |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
| 11 | * - Redistributions of source code must retain the above copyright notice, |
| 12 | * this list of conditions and the disclaimer below. |
| 13 | * |
| 14 | * Atmel's name may not be used to endorse or promote products derived from |
| 15 | * this software without specific prior written permission. |
| 16 | * |
| 17 | * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
| 20 | * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
| 23 | * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 24 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 25 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| 26 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | * ---------------------------------------------------------------------------- |
| 28 | */ |
| 29 | |
| 30 | /*------------------------------------------------------------------------------ |
| 31 | * Headers |
| 32 | *------------------------------------------------------------------------------*/ |
| 33 | |
| 34 | #include "board.h" |
| 35 | |
| 36 | #include <string.h> |
Christina Quast | cb646bc | 2015-05-03 14:21:26 +0200 | [diff] [blame] | 37 | #include <errno.h> |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 38 | |
Christina Quast | 95d6616 | 2015-04-09 22:38:47 +0200 | [diff] [blame] | 39 | volatile uint32_t char_stat; |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 40 | |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 41 | // FIXME: Remove: |
Christina Quast | a1dd0ef | 2015-03-22 19:06:12 +0100 | [diff] [blame] | 42 | #define PR TRACE_INFO |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 43 | //#define PR printf |
| 44 | |
Christina Quast | 4db82e0 | 2015-04-11 18:14:41 +0200 | [diff] [blame] | 45 | volatile ringbuf sim_rcv_buf = { {0}, 0, 0 }; |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 46 | |
Christina Quast | e4cbfe6 | 2015-04-20 13:07:28 +0200 | [diff] [blame] | 47 | /*----------------------------------------------------------------------------- |
| 48 | * Interrupt routines |
| 49 | *-----------------------------------------------------------------------------*/ |
| 50 | void Callback_PhoneRST_ISR( uint8_t *pArg, uint8_t status, uint32_t transferred, uint32_t remaining) |
| 51 | { |
| 52 | printf("rstCB\n\r"); |
| 53 | PIO_EnableIt( &pinPhoneRST ) ; |
| 54 | } |
| 55 | void ISR_PhoneRST( const Pin *pPin) |
| 56 | { |
| 57 | int ret; |
| 58 | // FIXME: no printfs in ISRs? |
| 59 | printf("+++ Int!! %x\n\r", pinPhoneRST.pio->PIO_ISR); |
| 60 | if ( ((pinPhoneRST.pio->PIO_ISR & pinPhoneRST.mask) != 0) ) |
| 61 | { |
| 62 | if(PIO_Get( &pinPhoneRST ) == 0) { |
| 63 | printf(" 0 "); |
| 64 | } else { |
| 65 | printf(" 1 "); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | if ((ret = USBD_Write( PHONE_INT, "R", 1, (TransferCallback)&Callback_PhoneRST_ISR, 0 )) != USBD_STATUS_SUCCESS) { |
| 70 | TRACE_ERROR("USB err status: %d (%s)\n", ret, __FUNCTION__); |
| 71 | return; |
| 72 | } |
| 73 | |
| 74 | /* Interrupt enabled after ATR is sent to phone */ |
| 75 | PIO_DisableIt( &pinPhoneRST ) ; |
| 76 | } |
| 77 | |
Christina Quast | 4db82e0 | 2015-04-11 18:14:41 +0200 | [diff] [blame] | 78 | /* |
| 79 | * char_stat is zero if no error occured. |
| 80 | * Otherwise it is filled with the content of the status register. |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 81 | */ |
Christina Quast | 4db82e0 | 2015-04-11 18:14:41 +0200 | [diff] [blame] | 82 | void USART1_IrqHandler( void ) |
| 83 | { |
| 84 | uint32_t stat; |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 85 | char_stat = 0; |
| 86 | // Rcv buf full |
Christina Quast | 4db82e0 | 2015-04-11 18:14:41 +0200 | [diff] [blame] | 87 | /* if((stat & US_CSR_RXBUFF) == US_CSR_RXBUFF) { |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 88 | TRACE_DEBUG("Rcv buf full"); |
Christina Quast | 4db82e0 | 2015-04-11 18:14:41 +0200 | [diff] [blame] | 89 | USART_DisableIt(USART1, US_IDR_RXBUFF); |
| 90 | } |
| 91 | */ |
| 92 | uint32_t csr = USART_PHONE->US_CSR; |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 93 | |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 94 | if (csr & US_CSR_TXRDY) { |
Christina Quast | 4db82e0 | 2015-04-11 18:14:41 +0200 | [diff] [blame] | 95 | /* transmit buffer empty, nothing to transmit */ |
| 96 | } |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 97 | if (csr & US_CSR_RXRDY) { |
| 98 | stat = (csr&(US_CSR_OVRE|US_CSR_FRAME| |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 99 | US_CSR_PARE|US_CSR_TIMEOUT|US_CSR_NACK| |
| 100 | (1<<10))); |
Christina Quast | 2b8a18b | 2015-04-12 09:31:36 +0200 | [diff] [blame] | 101 | uint8_t c = (USART_PHONE->US_RHR) & 0xFF; |
Christina Quast | a1dd0ef | 2015-03-22 19:06:12 +0100 | [diff] [blame] | 102 | // printf(" %x", c); |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 103 | |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 104 | if (stat == 0 ) { |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 105 | /* Fill char into buffer */ |
Christina Quast | 2b8a18b | 2015-04-12 09:31:36 +0200 | [diff] [blame] | 106 | rbuf_write(&sim_rcv_buf, c); |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 107 | } else { |
Christina Quast | 2b8a18b | 2015-04-12 09:31:36 +0200 | [diff] [blame] | 108 | PR("e %x st: %x\n", c, stat); |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 109 | } /* else: error occured */ |
Christina Quast | c0aa769 | 2015-02-25 14:02:01 +0100 | [diff] [blame] | 110 | |
Christina Quast | 4ba4d22 | 2015-03-02 16:14:09 +0100 | [diff] [blame] | 111 | char_stat = stat; |
| 112 | } |
| 113 | } |
Christina Quast | cb646bc | 2015-05-03 14:21:26 +0200 | [diff] [blame] | 114 | |
| 115 | /* FIDI update functions */ |
| 116 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) |
| 117 | |
| 118 | /* Table 6 from ISO 7816-3 */ |
| 119 | static const uint16_t fi_table[] = { |
| 120 | 0, 372, 558, 744, 1116, 1488, 1860, 0, |
| 121 | 0, 512, 768, 1024, 1536, 2048, 0, 0 |
| 122 | }; |
| 123 | |
| 124 | /* Table 7 from ISO 7816-3 */ |
| 125 | static const uint8_t di_table[] = { |
| 126 | 0, 1, 2, 4, 8, 16, 0, 0, |
| 127 | 0, 0, 2, 4, 8, 16, 32, 64, |
| 128 | }; |
| 129 | |
| 130 | /* compute the F/D ratio based on Fi and Di values */ |
| 131 | static int compute_fidi_ratio(uint8_t fi, uint8_t di) |
| 132 | { |
| 133 | uint16_t f, d; |
| 134 | int ret; |
| 135 | |
| 136 | if (fi >= ARRAY_SIZE(fi_table) || |
| 137 | di >= ARRAY_SIZE(di_table)) |
| 138 | return -EINVAL; |
| 139 | |
| 140 | f = fi_table[fi]; |
| 141 | if (f == 0) |
| 142 | return -EINVAL; |
| 143 | |
| 144 | d = di_table[di]; |
| 145 | if (d == 0) |
| 146 | return -EINVAL; |
| 147 | |
| 148 | if (di < 8) |
| 149 | ret = f / d; |
| 150 | else |
| 151 | ret = f * d; |
| 152 | |
| 153 | return ret; |
| 154 | } |
| 155 | |
| 156 | void update_fidi(uint8_t fidi) |
| 157 | { |
| 158 | int rc; |
| 159 | |
| 160 | uint8_t fi = fidi >> 4; |
| 161 | uint8_t di = fidi & 0xf; |
| 162 | |
| 163 | rc = compute_fidi_ratio(fi, di); |
| 164 | if (rc > 0 && rc < 0x400) { |
| 165 | TRACE_INFO("computed Fi(%u) Di(%u) ratio: %d", fi, di, rc); |
| 166 | /* make sure UART uses new F/D ratio */ |
| 167 | USART_PHONE->US_CR |= US_CR_RXDIS | US_CR_RSTRX; |
| 168 | USART_PHONE->US_FIDI = rc & 0x3ff; |
| 169 | USART_PHONE->US_CR |= US_CR_RXEN | US_CR_STTTO; |
| 170 | } else |
| 171 | TRACE_INFO("computed FiDi ratio %d unsupported", rc); |
| 172 | } |