33 static void bcm2835_i2c_update_interrupt(BCM2835I2CState *s)  in bcm2835_i2c_update_interrupt()  argument
37     if (s->c & BCM2835_I2C_C_INTR && s->s & BCM2835_I2C_S_RXR) {  in bcm2835_i2c_update_interrupt()
42     if (s->c & BCM2835_I2C_C_INTT && s->s & BCM2835_I2C_S_TXW) {  in bcm2835_i2c_update_interrupt()
47     if (s->c & BCM2835_I2C_C_INTD && s->s & BCM2835_I2C_S_DONE) {  in bcm2835_i2c_update_interrupt()
50     qemu_set_irq(s->irq, do_interrupt);  in bcm2835_i2c_update_interrupt()
53 static void bcm2835_i2c_begin_transfer(BCM2835I2CState *s)  in bcm2835_i2c_begin_transfer()  argument
55     int direction = s->c & BCM2835_I2C_C_READ;  in bcm2835_i2c_begin_transfer()
56     if (i2c_start_transfer(s->bus, s->a, direction)) {  in bcm2835_i2c_begin_transfer()
57         s->s |= BCM2835_I2C_S_ERR;  in bcm2835_i2c_begin_transfer()
59     s->s |= BCM2835_I2C_S_TA;  in bcm2835_i2c_begin_transfer()
62         s->s |= BCM2835_I2C_S_RXR | BCM2835_I2C_S_RXD;  in bcm2835_i2c_begin_transfer()
64         s->s |= BCM2835_I2C_S_TXW;  in bcm2835_i2c_begin_transfer()
68 static void bcm2835_i2c_finish_transfer(BCM2835I2CState *s)  in bcm2835_i2c_finish_transfer()  argument
80     i2c_end_transfer(s->bus);  in bcm2835_i2c_finish_transfer()
81     s->s |= BCM2835_I2C_S_DONE;  in bcm2835_i2c_finish_transfer()
84     s->s &= ~(BCM2835_I2C_S_TA | BCM2835_I2C_S_RXR |  in bcm2835_i2c_finish_transfer()
90     BCM2835I2CState *s = opaque;  in bcm2835_i2c_read()  local
95         readval = s->c;  in bcm2835_i2c_read()
98         readval = s->s;  in bcm2835_i2c_read()
101         readval = s->dlen;  in bcm2835_i2c_read()
104         readval = s->a;  in bcm2835_i2c_read()
108         if (s->s & BCM2835_I2C_S_TA) {  in bcm2835_i2c_read()
109             readval = i2c_recv(s->bus);  in bcm2835_i2c_read()
110             s->dlen -= 1;  in bcm2835_i2c_read()
112             if (s->dlen == 0) {  in bcm2835_i2c_read()
113                 bcm2835_i2c_finish_transfer(s);  in bcm2835_i2c_read()
116         bcm2835_i2c_update_interrupt(s);  in bcm2835_i2c_read()
119         readval = s->div;  in bcm2835_i2c_read()
122         readval = s->del;  in bcm2835_i2c_read()
125         readval = s->clkt;  in bcm2835_i2c_read()
138     BCM2835I2CState *s = opaque;  in bcm2835_i2c_write()  local
144         s->c = writeval & ~BCM2835_I2C_C_ST;  in bcm2835_i2c_write()
148             bcm2835_i2c_begin_transfer(s);  in bcm2835_i2c_write()
153             if (s->dlen == 0) {  in bcm2835_i2c_write()
154                 bcm2835_i2c_finish_transfer(s);  in bcm2835_i2c_write()
158         bcm2835_i2c_update_interrupt(s);  in bcm2835_i2c_write()
161         if (writeval & BCM2835_I2C_S_DONE && s->s & BCM2835_I2C_S_DONE) {  in bcm2835_i2c_write()
163             s->dlen = s->last_dlen;  in bcm2835_i2c_write()
167         s->s &= ~(writeval & (BCM2835_I2C_S_DONE |  in bcm2835_i2c_write()
171         s->dlen = writeval;  in bcm2835_i2c_write()
172         s->last_dlen = writeval;  in bcm2835_i2c_write()
175         s->a = writeval;  in bcm2835_i2c_write()
179         if (s->s & BCM2835_I2C_S_TA) {  in bcm2835_i2c_write()
180             if (s->s & BCM2835_I2C_S_TXD) {  in bcm2835_i2c_write()
181                 if (!i2c_send(s->bus, writeval & 0xff)) {  in bcm2835_i2c_write()
182                     s->dlen -= 1;  in bcm2835_i2c_write()
184                     s->s |= BCM2835_I2C_S_ERR;  in bcm2835_i2c_write()
188             if (s->dlen == 0) {  in bcm2835_i2c_write()
189                 bcm2835_i2c_finish_transfer(s);  in bcm2835_i2c_write()
192         bcm2835_i2c_update_interrupt(s);  in bcm2835_i2c_write()
195         s->div = writeval;  in bcm2835_i2c_write()
198         s->del = writeval;  in bcm2835_i2c_write()
201         s->clkt = writeval;  in bcm2835_i2c_write()
221     BCM2835I2CState *s = BCM2835_I2C(dev);  in bcm2835_i2c_realize()  local
222     s->bus = i2c_init_bus(dev, NULL);  in bcm2835_i2c_realize()
224     memory_region_init_io(&s->iomem, OBJECT(dev), &bcm2835_i2c_ops, s,  in bcm2835_i2c_realize()
226     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);  in bcm2835_i2c_realize()
227     sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);  in bcm2835_i2c_realize()
232     BCM2835I2CState *s = BCM2835_I2C(dev);  in bcm2835_i2c_reset()  local
235     s->c = 0x0;  in bcm2835_i2c_reset()
236     s->s = BCM2835_I2C_S_TXD | BCM2835_I2C_S_TXE;  in bcm2835_i2c_reset()
237     s->dlen = 0x0;  in bcm2835_i2c_reset()
238     s->a = 0x0;  in bcm2835_i2c_reset()
239     s->div = 0x5dc;  in bcm2835_i2c_reset()
240     s->del = 0x00300030;  in bcm2835_i2c_reset()
241     s->clkt = 0x40;  in bcm2835_i2c_reset()
250         VMSTATE_UINT32(s, BCM2835I2CState),