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Add support for 10M and half-duplex in STM32 and TM4C drivers

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Sergio R. Caprile committed 2023-02-02 12:02:44 -03:00
1 parent 961cc13948
commit e3ca006265
3 files changed
+90 -24
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mip/driver_tm4c.c
+21 -5
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@@ -35,7 +35,12 @@ static uint32_t s_txdesc[ETH_DESC_CNT][ETH_DS]; // TX descriptors
static uint8_t s_rxbuf[ETH_DESC_CNT][ETH_PKT_SIZE]; // RX ethernet buffers
static uint8_t s_txbuf[ETH_DESC_CNT][ETH_PKT_SIZE]; // TX ethernet buffers
static struct mip_if *s_ifp; // MIP interface
enum { EPHY_ADDR = 0, EPHYBMCR = 0, EPHYBMSR = 1 }; // PHY constants
enum {
EPHY_ADDR = 0,
EPHYBMCR = 0,
EPHYBMSR = 1,
EPHYSTS = 16
}; // PHY constants
static inline void tm4cspin(volatile uint32_t count) {
while (count--) (void) 0;
@@ -124,7 +129,8 @@ static int guess_mdc_cr(void) {
}
static bool mip_driver_tm4c_init(struct mip_if *ifp) {
struct mip_driver_tm4c_data *d = (struct mip_driver_tm4c_data *) ifp->driver_data;
struct mip_driver_tm4c_data *d =
(struct mip_driver_tm4c_data *) ifp->driver_data;
s_ifp = ifp;
// Init RX descriptors
@@ -178,7 +184,8 @@ static bool mip_driver_tm4c_init(struct mip_if *ifp) {
}
static uint32_t s_txno;
static size_t mip_driver_tm4c_tx(const void *buf, size_t len, struct mip_if *ifp) {
static size_t mip_driver_tm4c_tx(const void *buf, size_t len,
struct mip_if *ifp) {
if (len > sizeof(s_txbuf[s_txno])) {
MG_ERROR(("Frame too big, %ld", (long) len));
len = 0; // fail
@@ -203,8 +210,17 @@ static size_t mip_driver_tm4c_tx(const void *buf, size_t len, struct mip_if *ifp
static bool mip_driver_tm4c_up(struct mip_if *ifp) {
uint32_t bmsr = emac_read_phy(EPHY_ADDR, EPHYBMSR);
(void) ifp;
return (bmsr & BIT(2)) ? 1 : 0;
bool up = (bmsr & BIT(2)) ? 1 : 0;
if ((ifp->state == MIP_STATE_DOWN) && up) { // link state just went up
uint32_t sts = emac_read_phy(EPHY_ADDR, EPHYSTS);
uint32_t emaccfg = EMAC->EMACCFG | BIT(14) | BIT(11); // 100M, Full-duplex
if (sts & BIT(1)) emaccfg &= ~BIT(14); // 10M
if ((sts & BIT(2)) == 0) emaccfg &= ~BIT(11); // Half-duplex
EMAC->EMACCFG = emaccfg; // IRQ handler does not fiddle with this register
MG_DEBUG(("Link is %uM %s-duplex", emaccfg & BIT(14) ? 100 : 10,
emaccfg & BIT(11) ? "full" : "half"));
}
return up;
}
void EMAC0_IRQHandler(void);